PARSNIP SHEET CAKE WITH CREAM CHEESE FROSTING AND GINGER

Parsnip Sheet Cake With Cream Cheese Frosting and Ginger image

Provided by Melissa Clark

Time 1h

Yield 12 to 15 servings

Number Of Ingredients 24

Unsalted butter, for greasing the pan
1 1/2 cups/185 grams all-purpose flour, plus more for the pan
1 1/2 cups/185 grams walnuts
3/4 cup plus 3 tablespoons/225 milliliters roasted walnut oil or vegetable oil
3/4 cup/150 grams granulated sugar
3/4 cup/165 grams light brown sugar
3 large eggs
2 teaspoons vanilla extract
2 teaspoons ground cinnamon
2 teaspoons ground ginger
1 1/2 teaspoons ground cardamom
1/4 teaspoon ground cloves
A generous grating of nutmeg
1 1/2 teaspoons baking powder
3/4 teaspoon baking soda
1/4 teaspoon kosher salt
3 cups grated parsnips (from about 4 parsnips)
3/4 cup golden raisins
8 ounces/225 grams cream cheese, at room temperature
1/2 cup/115 grams unsalted butter (1 stick), softened
1 cup/120 grams confectioners' sugar, sifted
2 tablespoons maple syrup
1 teaspoon vanilla extract
1/2 cup chopped crystallized ginger

Steps:

Prepare the cake: Heat oven to 350 degrees. Butter a 9-by-13-inch metal baking pan. Line with parchment paper, butter the parchment, then flour the pan, tapping out excess.
Place the walnuts on a small baking sheet and toast until fragrant and turning golden brown, 6 to 8 minutes. Let cool, then coarsely chop.
In a medium bowl, whisk together the oil, granulated sugar, brown sugar, eggs and vanilla. In a large bowl, whisk together the flour, cinnamon, ginger, cardamom, cloves, nutmeg, baking powder, baking soda and salt. Stir the wet ingredients into the dry ingredients until thoroughly combined. Stir in the parsnips, raisins and walnuts.
Spread the batter in the prepared pan and bake until the top springs back when touched, the cake is turning brown around the edges, and a toothpick comes out dry, 35 to 40 minutes. Cool in the pan for 15 minutes, then invert onto a cooling rack, peel off parchment, and let cool completely. When cooled, invert onto a serving platter.
Prepare the frosting: Put the cream cheese in the bowl of a stand mixer fitted with the paddle attachment (or a mixing bowl, if using a hand mixer). Cream the cream cheese until smooth, then add the butter, confectioners' sugar, maple syrup and vanilla. Beat until well combined and fluffy. Spread over the top of the cooled cake almost to the edges. Top with the candied ginger. The cake keeps well for several days at room temperature.