Best Salted Chocolate Tart Recipes

SALTED DARK CHOCOLATE TART

Steps:

• In a small bowl, combine cookie crumbs and butter; press onto the bottom and up the sides of a greased 9-in. fluted tart pan with removable bottom. Cover and refrigerate for 30 minutes., For caramel, in a small saucepan over medium heat, combine sugar and water. Cook, shaking pan occasionally, until sugar is melted and mixture is almost clear (do not boil). , Increase heat to medium high; bring to a boil, without stirring. Cover and boil for 2 minutes while tightly holding lid of pan down. Uncover; shake pan. Cook 1-2 minutes longer or until mixture is amber, shaking pan several times., Remove from the heat; stir in cream (mixture will bubble) until smooth. Stir in butter (mixture will bubble) and salt until blended. Pour into crust; refrigerate for 15 minutes., Place chocolate in a large bowl. In a small saucepan, bring cream just to a boil. Pour over chocolate; whisk until smooth. Stir in vanilla. Let stand for 20 minutes. , Pour chocolate mixture over caramel. Sprinkle with sea salt. Refrigerate for at least 3 hours. Remove from the refrigerator about 45 minutes before serving.

CHOCOLATE, HAZELNUT & SALTED CARAMEL TART

Steps:

• To make the pastry, whizz the hazelnuts in a food processor until finely ground. Add the flour, icing sugar and butter, and pulse until the mixture resembles breadcrumbs. Add the egg yolk and 1-2 tbsp cold water, and pulse until the dough comes together. Tip the dough out and flatten into a disc, then wrap in cling film and chill for 30 mins.
• Heat oven to 180C/160C fan/gas 4. On a floured surface, roll out the pastry to line a 23cm loose-bottomed, deep tart tin. Trim the edges and prick the base with a fork, then line with baking parchment and fill with baking beans. Bake for 20 mins, then carefully remove the baking beans and parchment and bake for a further 5-10 mins until light golden. Allow to cool.
• Meanwhile, make the salted caramel. Tip the sugar into a small pan, add 1-2 tbsp water and heat gently to dissolve the sugar. Increase the heat and cook until the sugar turns to an ambercoloured caramel. Reduce the heat and add the butter, cream and golden syrup, and stir until the sauce is smooth and thickened. Remove from the heat and add the salt. Allow to cool for a few mins, then spread onto the tart base. Scatter with chopped hazelnuts and set aside.
• For the chocolate filling, melt the chocolate and butter in a heatproof bowl set over a pan of simmering water. Stir until smooth, then remove from the heat and allow to cool slightly. In a separate bowl, whisk the eggs, egg yolk and caster sugar for about 6 mins until thick and pale. Fold in the melted chocolate and cocoa, then pour into the tart case. Transfer to a baking sheet and cook for 20-25 mins or until set and the top has formed a crust. Allow to cool to room temperature before serving in slices.

SALTED CARAMEL CHOCOLATE GANACHE TART

Steps:

• Preheat the oven to 350 degrees F.
• For the crust, whisk to combine the flour, cocoa powder and salt; set aside.
• In another bowl, cream together the butter and sugar. Add in the egg yolks and vanilla and mix until combined. Little by little, add the dry ingredients until incorporated. The dough may look crumbly, but it should come together easily when you pinch the dough between two fingers.
• Press the dough out into a tart pan. Prick all over with a fork and put into the freezer for 10 minutes. Bake chilled crust for 15 minutes, then cool completely on a wire rack.
• For the caramel, place the sugar, corn syrup and salt in a heavy bottomed saucepan over medium high heat. Stir to combine, but onces the mixture begins to bubble stop stirring for the remainder of the cooking process. The sugar will first turn clear, then it will noticeably start bubbling and eventually take on color. Continue to cook, without stirring, until a candy thermometer inserted into the syrup reads 340°, stir in the butter. Remove the pan from the heat and carefully (watch the sputtering) add the heavy cream and vanilla. Pour the caramel into the cooled crust and refrigerate for about 3-4 hours or until set.
• To make the chocolate ganache, heat the heavy cream to a simmer, then pour it over the chocolate. Let it sit for 60 seconds, then stir until smooth. Pour the chocolate ganache over the caramel tart and refrigerate for a few hours until set.
• To serve, cut into slices and garnish with sea salt.

SALTED CARAMEL-CHOCOLATE TART

Steps:

• Crust:
• Whisk cocoa, sugar, salt, and 1 2/3 cups flour in a medium bowl. Add butter and toss to coat. Using your fingers, smash butter into dry ingredients until it nearly disappears (you shouldn't see any large bits) and mixture holds together when squeezed-you're working it more than you would pie dough. Make a well in the center and add yolk and milk. Using a fork, gradually incorporate flour mixture until you've got a shaggy dough. Knead a couple of times in bowl until no dry spots remain and dough is smooth. Flatten into a 3/4"-thick disk, wrap tightly in plastic, and chill until firm, about 2 hours. (You can make the caramel filling during this time.)
• Preheat oven to 350°F. Let dough sit 5 minutes to soften slightly. Roll out on a lightly floured surface to a 14" round about 1/8" thick, dusting with more flour as needed to prevent sticking. Lift dough on one edge and throw a pinch of flour on surface. Slide bottom of tart pan under dough, positioning it roughly in the center. Fold in edges of dough so it's resting fully on insert; place inside tart ring and unfold edges so they gently slump against sides of pan and excess dough is hanging over the edges. Press dough firmly into bottom of pan with floured hands, then use a straight-sided measuring cup to firmly press sides of dough into grooves and up sides of pan. Roll pin over top edge of pan to shear off excess dough flush with pan. Reserve dough scraps for patching any potential cracks later. Prick bottom of dough all over with a fork and chill in freezer until very firm, 10-15 minutes.
• Place tart pan on a rimmed baking sheet and line with a sheet of parchment paper or foil. Fill with pie weights or dried beans and bake until edges of crust are set and starting to look dry, 12-15 minutes. Carefully lift parchment with weights. Patch any visible cracks with reserved dough. Return crust to oven and bake until firm and dry all over, 18-22 minutes. Transfer to a wire rack and let cool.
• Filling:
• Bring sugar, cream of tartar, and 1/3 cup water to a boil in a large saucepan over medium-low, stirring with a heatproof spatula until dissolved. Cook, swirling pot often but not stirring, until mixture turns deep amber and wisps of smoke rise from the surface, 8-10 minutes. Remove caramel from heat and immediately stir in butter a piece at a time until smooth (be careful; mixture will sputter). Gradually stir in cream, then add salt. Transfer caramel to a heatproof measuring glass (you should have about 1 1/2 cups). Let cool until warm.
• Pour caramel into cooled tart shell. Chill until caramel is set, at least 1 hour.
• Ganache:
• Place chocolate, cream, and butter in a heatproof bowl set over a saucepan of simmering water (bowl should not touch water). Stir with a heatproof spatula until ganache is smooth, about 5 minutes. Let cool until thickened enough to hold an indentation from a spoon.
• Remove tart from refrigerator and scrape ganache over caramel. Using a spoon, gently work ganache over surface, creating decorative swooshes and swirls. Sprinkle with sea salt; let sit until ganache has lost its sheen, 10-15 minutes.
• Do Ahead
• Dough can be made 2 days ahead; keep chilled. Crust can be baked 1 day ahead. Store tightly wrapped at room temperature. Caramel filling can be made 3 days ahead; cover and chill. Microwave in 20-second intervals, stirring in between, just until pourable. Caramel-filled tart can be made 1 day ahead; once it's set, cover and keep chilled. Tart can be assembled 1 day ahead. Chill until ganache is set, then cover loosely. Let sit at room temperature 15 minutes before slicing.

SEA-SALTED CHOCOLATE & PECAN TART

Steps:

• To make the pastry, cream the butter and sugar with a wooden spoon or in an electric mixer until light and creamy. Add the egg yolks and 35ml water and mix well until all the liquid has been incorporated. Gradually mix in the flour and cocoa powder until a paste is formed. It will be quite a soft dough.
• Wrap the pastry in foil, flatten it with your hand and chill for 1 hr. The pastry can be made two days ahead, though in this case, you may want to remove it from the fridge for a few minutes before rolling to soften it.
• Sprinkle your work surface with a light dusting of flour and roll out the pastry until it's about 5mm thick. Line a 23cm tart tin with the pastry using the rolling pin to help you lift it over, pushing the pastry well into the edges and folding the excess over the top. Trim off the excess. Chill for 15 mins to relax the pastry and to help prevent it from shrinking during cooking.
• Heat oven to 180C/160C fan/gas 4. Line the tart with a sheet of baking parchment (scrunch it up first to soften it), then tip in baking beans, rice or lentils and bake blind for 15 mins. Lift out the beans and bake for a further 10-12 mins until the base is dry. Allow to cool.
• To make the filling, put all the ingredients in a glass or metal mixing bowl, place it over a pan of very hot water and allow them to melt together until glossy and thick. Pour into the cooled pastry case and chill for 4 hrs or overnight.
• For the topping, heat the sugar in a saucepan on a medium heat, tilt the pan rather than stirring, until you have an even golden liquid caramel. Add the salt and mix well with a wooden spoon or heatproof spatula. Pour in the pecans and, mixing thoroughly, quickly pour the mixture on to a piece of baking parchment and spread out with the back of the spoon. Allow to cool thoroughly, then break or chop up into shards or chunky pieces to sprinkle over the ganache.
• Cut the tart with a hot, wet knife for perfect, restaurant-quality slices. Recipe adapted from Adventures with Chocolate by Paul A Young (£14.99, Kyle Books). Photographs © Anders Schønnemann.

SALTED CHOCOLATE TART

Steps:

• For the base: Snap the oreos into pieces and drop them into the bowl of a food processor. Do likewise with the chocolate, then blitz them together until you have crumbs. Add the butter and salt, and blitz again until the mixture starts to clump together. If you're doing this by hand, bash the cookies in a freezer bag until they form crumbs, finely chop the chocolate and melt the butter, then mix everything, along with the salt, in a large bowl with a wooden spoon or your hands encased in disposable gloves.
• Press the mixture into a 23-centimeter/10-inch deep-sided, loose-bottomed flan or tart pan. Pat down on the bottom and up the sides of the pan with your hands or the back of a spoon, so that the base and sides are evenly lined and smooth. Put into the fridge to chill and harden for at least 1 hour, or 2 hours if your fridge is stacked. I wouldn't keep it for longer than a day like this as the Oreo crust tends to get too crumbly.
• For the filling: Finely chop the chocolate. Put the corn starch into a cup and whisk in the milk until smooth. Pour the cream into a heavy-based saucepan into which all the ingredients can fit and be stirred without splashing out of the pan, then add the finely chopped rubble of chocolate, the sieved cocoa (or just sieve it straight in), espresso or instant coffee powder, sugar, vanilla paste or extract, olive oil and smoked salt. Place over a medium to low heat and whisk gently--I use a very small whisk for this, as I'm not aiming to get air in the mixture, I'm just trying to banish any lumpiness--as the cream heats and the chocolate starts melting.
• Off the heat, whisk in the corn starch and milk mixture until it, too, is smoothly incorporated, and put the pan back on a low heat. With a wooden spoon, keep stirring until the mixture thickens, which it will do around the 10-minute mark, but be prepared for it to take a few minutes more or less. Take the pan off the heat every so often, still stirring, so that everything melds together, without the cream coming to a boil. When ready, it should be thick enough to coat the back of a wooden spoon, and if you run your finger through it (across the back of the spoon) the line should stay.
• Pour the mixture into a wide measuring jug or batter jug (it should come to about the 600 milliliter/2 1/2 cup mark). Now run a piece of baking parchment or greaseproof paper under cold water, wring it out and place the damp, crumpled piece right on top of the chocolate mixture, then put the jug into the fridge for 15 minutes. The mixture will still be warm, but will be the right temperature to ooze into the base without melting it.
• Pour and scrape the mixture into the cookie-lined tart pan and put it back in the fridge overnight. Don't leave it longer than 24 hours, as the base will start to soften.
• Take the tart out of the fridge for 10 minutes before serving, but unmould straight away. Sit the tart pan on top of a large tin or jar and let the ring part fall away, then transfer the dramatically revealed tart to a plate or board. Leave the pan base on.
• Slice modestly--this is rich and sweet, and people can always come back for more--and serve with creme fraiche; the sharpness is just right here. Leftovers will keep in the fridge for 4 to 5 days, but the base will soften and the sides crumble a bit. That will not detract from your eating pleasure too much, but I still like to give it its first outing at optimal stage!

SALTED CHOCOLATE CARAMEL TART

Steps:

• Make the tart shell:
• Preheat oven to 300°F. In the bowl of a food processor, pulse almonds until finely ground; remove and set aside. Add butter, sugar, and vanilla to food processor and pulse to combine well. Return ground almonds to food processor along with flour and salt and pulse briefly until a dough begins to form. Transfer dough (it will be crumbly) to a 10-inch tart pan with a removable bottom. Press the crumbs into the bottom and up the sides, using your knuckles to spread it as evenly as possible. Chill until firm, at least 30 minutes. Prick dough all over with a fork and bake until just golden brown, about 45 minutes. Set pan on a wire rack and let crust cool completely.
• Make the caramel:
• Place a pastry brush in a cup of water near the stove. In a medium saucepan, stir together the sugar, water, and corn syrup. Cook over medium-high heat, swirling gently but not stirring, and occasionally using the pastry brush to wash down any sugar crystals from the sides of the pan. Continue to cook until caramel reaches a dark amber color, swirling frequently as it darkens, 15 to 20 minutes total. Remove from heat and carefully add the cream all at once (it will bubble up). Add the butter, vanilla, and salt, and when the bubbles die down a bit, whisk caramel until smooth. Pour into tart shell and set aside to cool for 20 minutes. Then, refrigerate until chilled, at least 1 hour, or up to one day ahead.
• Make the ganache:
• After the caramel-filled tart has chilled for at least an hour, melt the chocolate gently in a bowl set atop barely simmering water in a saucepan. Stir until smooth and set aside to cool slightly. Stir the crème fraîche into the chocolate, followed by the butter and corn syrup. Stir to combine well. Spread over the cooled caramel tart and refrigerate until set, at least 30 minutes (or up to 3 hours). Let stand at room temperature for 30 minutes before serving, and garnish with flaky salt, if desired.

SALTED HONEY FUDGE & CHOCOLATE TART

Steps:

• Dice the pastry into chunks and put in a food processor. Sift over the cocoa, drizzle over the honey, then pulse to combine into a chocolate pastry (see tip box, below left). Roll out the dough on a lightly cocoa-dusted work surface, big enough to line a 23cm loose-bottomed tart tin with a little overhang. Cover and chill for 30 mins.
• Heat oven to 200C/180C fan/gas 6. Scrunch up a big sheet of baking parchment and use to line the tart tin. Fill with baking beans and bake for 15-20 mins until sandy and the sides are firm. Remove the beans and paper, and bake for a further 5-15 mins until really biscuity. Trim off the overhang and cool.
• Put the honey fudge ingredients into a small pan and warm gently until the butter has completely melted. Bring to a gentle simmer and bubble, stirring, for 4-5 mins until more golden coloured and thickened. Stir in ¼-½ tsp good salt (to taste), then pour into the tart case. Chill for 30 mins.
• For the topping, mix the chocolate and cream in a heatproof bowl over a pan of barely simmering water. Gently melt, stirring occasionally, until combined. Cool for 5 mins, then pour into the tart case gently, covering the honey layer. Chill until ready to serve.
• Remove from the fridge 10 mins before serving, to soften a little. Dust with cocoa and scatter with a little crumbled honeycomb, if you like, then serve with dollops of crème fraîche or a jug of cream.

SALTED CHOCOLATE CARAMEL TART

Steps:

• Preheat oven to 350°F. Place the butter and sugar in a food processor and process until pale. Add the cocoa, flour, egg and vanilla and process to a smooth dough. Press into the base and sides of a 26cm loose-bottomed, fluted tart tin to 5mm thick. Trim the edges and refrigerate until firm. Prick the dough with a fork and bake for 15 minutes or until the pastry is cooked. Set aside.
• To make the filling, place the cream and butter in a saucepan over medium heat until melted. Set aside. Place the sugar and water in a saucepan over low heat and stir until the sugar has dissolved. Increase the heat to high and boil, without stirring, until dark golden and the mixture reaches 170°C (340°F) on a sugar thermometer. Remove from the heat and carefully whisk in the cream mixture. Return the pan to low heat and stir for 5 minutes or until thickened. Pour into the pastry shell and refrigerate until firm.
• To make the glaze, place the cream in a saucepan over low heat. Add the chocolate and stir until melted and smooth. Pour the chocolate over the caramel and refrigerate until firm. Sprinkle with salt and cut into wedges to serve.

VEGAN CHOCOLATE TART WITH SALTED OAT CRUST

Steps:

• Crust:
• Preheat oven to 350°F. Pulse oats, whole wheat flour, coconut oil, agave, cocoa, salt, and cinnamon in a food processor until oats are coarsely ground and mixture looks like wet sand.
• Firmly press into bottom and up the sides of tart pan. Bake until crust is golden brown and smells toasty, 20-25 minutes. Transfer to a wire rack; let cool.
• Filling and Assembly:
• Dissolve espresso powder in 3/4 cup very hot water in a food processor. Add cocoa and let sit 5 minutes. Add melted chocolate, agave syrup, vanilla, 2/3 cup coconut oil, and 2/3 teaspoon kosher salt and process until mixture is very smooth and thick, about 30 seconds.
• Scrape filling into cooled tart shell and smooth top (if making tart in a rectangular shell, you may have a little filling left over; save for another use, like truffles). Tap tart lightly against counter to pop any air bubbles in filling.
• Cook oats and remaining 1 teaspoon coconut oil in a small skillet over low heat, stirring constantly, until oats are toasted, about 3 minutes. Gradually add half of demerara sugar, stirring constantly, until sugar is melted, then remove from heat and stir in remaining demerara sugar just to coat. Season with kosher salt; let oat mixture cool.
• Scatter oat mixture over tart, sprinkle with sea salt, and chill until filling is set, at least 1 hour.
• Cut chilled tart into slices with a dry, hot knife; let sit at room temperature 15-20 minutes before serving.
• Do Ahead
• Tart can be made 2 days ahead. Once filling is set, cover and keep chilled.

VEGAN CHOCOLATE TART WITH SALTED OAT CRUST

Steps:

• Crust Preheat oven to 350˚. Pulse oats, whole wheat flour, coconut oil, agave, cocoa, salt, and cinnamon in a food processor until oats are coarsely ground and mixture looks like wet sand. Firmly press into bottom and up the sides of tart pan. Bake until crust is golden brown and smells toasty, 20–25 minutes. Transfer to a wire rack; let cool. Filling and Assembly Dissolve espresso powder in ¾ cup very hot water in a food processor. Add cocoa and let sit 5 minutes. Add melted chocolate, agave syrup, vanilla, ⠔ cup coconut oil, and ¼ tsp. kosher salt and process until mixture is very smooth and thick, about 30 seconds. Scrape filling into cooled tart shell and smooth top (if making tart in a rectangular shell, you may have a little filling left over; save for another use, like truffles). Tap tart lightly against counter to pop any air bubbles in filling.
 Cook oats and remaining 1 tsp. coconut oil in a small skillet over low heat, stirring constantly, until oats are toasted, about 3 minutes. Gradually add half of demerara sugar, stirring constantly, until sugar is melted, then remove from heat and stir in remaining demerara sugar just to coat. Season with kosher salt; let oat mixture cool. 
 Scatter oat mixture over tart, sprinkle with sea salt, and chill until filling is set, at least 1 hour. 
 Cut chilled tart into slices with a dry, hot knife; let sit at room temperature 15–20 minutes before serving.
 Do Ahead: Tart can be made 2 days ahead. Once filling is set, cover and keep chilled.

SALTED CARAMEL CHOCOLATE TART

Steps:

• Preheat the oven to 350 degrees F. For the crust, whisk to combine the flour, cocoa powder, and salt. Set aside. In another bowl, cream together the butter and sugar. Add in the egg yolks and vanilla, and mix until combined. Little by little, add the dry ingredients until incorporated. The dough may look crumbly, but it should come together easily when you pinch the dough between two fingers. Press the dough out into your tart pan. Prick all over with a fork, and pop into the freezer for 10 minutes. Bake for 15 minutes, then cool completely on a wire rack. For the caramel, place the sugar in a heavy bottomed saucepan, then give it a shake to flatten out the sugar pile. Add the water, corn syrup, and salt, but DO NOT STIR. Cook over medium to medium high heat until the sugar turns clear and dissolves (be patient, this may take 20 minutes, but you don't want to rush caramel or it may burn in a flash). After the sugar has dissolved, it will bubble more vigorously and the sugar mixture will start to take on an amber color. Once it looks caramel colored, stir in the butter. Be careful of potential sputtering. Remove the pan from the heat, and add the heavy cream and vanilla (and again, stand back). Don't worry if the caramel separates. Cook for 10 minutes over medium high heat, stirring with a spatula, until it's smooth and thickened. Pour the caramel into the cooled crust, and refrigerate for about 3 hours, until set. To make the chocolate ganache, heat the heavy cream to a simmer, then pour it over the chocolate. Let it sit for 60 seconds, then stir until smooth. Pour the chocolate ganache over the caramel tart, and refrigerate for a few hours until set. To serve, cut into slices and garnish with sea salt, if desired. Enjoy!!!

CHOCOLATE SALTED CARAMEL TART

Steps:

• 1. Prepare the sweet pastry. In a large bowl mix flour with ground almonds, cocoa powder, sugar and salt. 2. Incorporate butter to the flour mixture, using a pastry blender, a fork or a pastry processor, until crumbs are formed. Add the egg and vanilla extract and mix them in. Add water and incorporate into the dough. Wrap it with plastic, knead slowly to form a disc and refrigerate for at least 30 minutes or overnight. 3. On a floured surface or over the plastic wrap roll the dough to a circle with about 1 1/2 inches larger than your tart pan. Lift up the rolled dough and place it on a greased 9 inch tart pan. Remove the edges and refrigerate for 30 minutes before baking. 4. Prick the dough with a fork, line a parchment paper over the dough. Fill with dry beans, rice or pie weights. 5. Bake for 15 minutes in preheated 350 F (180C) oven. Remove the weights and the parchment paper. Return to oven for another 10 to 15 minutes. Allow to cool before removing from the tart pan. 6. Prepare the caramel. Place the sugar and water in a medium heavy bottomed saucepan over medium-high heat, and cook without stirring until sugar dissolves and gets a caramel color. 7. Remove the pan from the heat and add the cream. It will bubble a little bit. 8. Cook for about 1 or 2 minutes stirring constantly with a wooden spoon until smooth. Remove from heat and add butter and salt. Stir well until smooth. 9. Let the caramel cool slightly and pour over the chocolate crust. Refrigerate for about 4-5 hours. 10. Prepare the chocolate ganache. Heat the cream in a small saucepan. When the cream just begins to boil at the edges, remove from heat and pour over the chopped chocolate. Let sit one minute, then stir until smooth. 11. Pour the chocolate ganache over the caramel. Spread it evenly and refrigerate for another 2-3 hours before serving. Sprinkle with sea salt flakes and serve.

SALTED CHOCOLATE TART

Steps:

• Equipment: 23cm/10in deep-sided (approx. 5cm/2in deep), loose-bottomed flan tin.
• For the base:.
• Snap the biscuits into pieces and drop them into the bowl of a food processor. Do likewise with the chocolate, then blitz them together until you have crumbs. Add the butter and salt, and blitz again until the mixture starts to clump together. If you're doing this by hand, bash the biscuits in a freezer bag until they form crumbs, finely chop the chocolate and melt the butter, then mix everything, along with the salt, in a large bowl with a wooden spoon or your hands encased in disposable vinyl gloves.
• Press into your tart tin and pat down on the bottom and up the sides of the tin with your hands or the back of a spoon, so that the base and sides are evenly lined and smooth. Put into the fridge to chill and harden for at least 1 hour, or 2 hours if your fridge is stacked. I wouldn't keep it for longer than a day like this as the Oreo crust tends to get too crumbly.
• For the filling:.
• Finely chop the chocolate. Put the cornflour into a cup and whisk in the milk until smooth. (I find it easier to use cups for the liquids - in which case the milk measure is equivalent to an American quarter cup, and you'll need 2 cups of cream.).
• Pour the cream into a heavy-based saucepan into which all the ingredients can fit and be stirred without splashing out of the pan, then add the finely chopped rubble of chocolate, the sieved cocoa (or just sieve it straight in), espresso or instant coffee powder, sugar, vanilla paste or extract, olive oil and smoked salt. Place over a medium to low heat and whisk gently - I use a very small whisk for this, as I'm not aiming to get air in the mixture, I'm just trying to banish any lumpiness - as the cream heats and the chocolate starts melting.
• Off the heat, whisk in the cornflour and milk mixture until it, too, is smoothly incorporated, and put the pan back on a low heat. With a wooden spoon, keep stirring until the mixture thickens, which it will do around the 10-minute mark, but be prepared for it to take a few minutes more or less. Take the pan off the heat every so often, still stirring, so that everything melds together, without the cream coming to a boil. When ready, it should be thick enough to coat the back of a wooden spoon, and if you run your finger through it (across the back of the spoon) the line should stay.
• Pour into a wide measuring jug or batter jug (it should come to about the 600ml/2 1/2 cup mark). Now run a piece of baking parchment or greaseproof paper under the cold tap, wring it out and place the damp, crumpled piece right on top of the chocolate mixture, then put the jug into the fridge for 15 minutes. The mixture will still be warm, but will be the right temperature to ooze into the base without melting it.
• Pour and scrape the mixture into the biscuit-lined flan tin and put back in the fridge overnight. Don't leave it longer than 24 hours, as the base will start to soften.
• Take out of the fridge for 10 minutes before serving, but unmould straight away. Sit the flan tin on top of a large tin or jar and let the ring part fall away, then transfer the dramatically revealed tart to a plate or board. Leave the tin base on.
• Slice modestly - this is rich and sweet, and people can always come back for more - and serve with crème fraîche; the sharpness is just right here. Leftovers will keep in the fridge for 4-5 days, but the base will soften and the sides crumble a bit. That will not detract from your eating pleasure too much, but I still like to give it its first outing at optimal stage!
• MAKE AHEAD NOTES: Base can be made 1 day ahead. When firm, cover and keep refrigerated until needed. Tart/filling can be made 1 day ahead. Fill tart and refrigerate overnight, until set. Tent with foil, trying not to touch the surface of the tart.
• STORE NOTE: Store the tart in fridge until needed. Leftovers will keep in fridge for 4-5 days. The base will soften gradually as the tart stands.