SLOW-COOKER FRENCH ONION SOUP

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Slow-Cooker French Onion Soup image

From Cook's Country April/May 2010 Why this recipe works: Soy sauce, sherry, and thyme added early on helped boost flavor of our Slow-Cooker French Onion Soup recipe, but the addition of beef bones reproduced the rich meatiness of the classic. We microwaved the bones for a few minutes before placing them in the slow cooker to simulate roasting without having to turn on the oven or dirty a roasting pan. Apple butter provided one of our favorite pork chop recipes with a silky sauce, and it had a similar effect in our Slow-Cooker French Onion Soup. Best of all, tasters never knew it was there. Because broiler-safe soup crocks are hard to come by, we opted to broil slices of bread topped with Gruyère cheese and add them to the soup at the end. Serves 6 to 8 Total time: The Slice is Right Most soup recipes start by chopping or mincing onions. For this recipe, we wanted slices that would retain their shape through 10 to 12 hours of gentle simmering. We found that cutting onions with the grain (rather than across it) yielded slices durable enough for the slow cooker. • 1. Using a chef's knife, trim off both ends of the onion. • 2. Turn onion onto cut end to steady it and slice in half, pole to pole. • 3. Peel each half, place flat side down, and cut onion into slices. Key Ingredients: Not Very French The bones we get. But apple butter and soy sauce?! Together, they contribute color, flavor, and silkiness. • MICROWAVED BEEF BONES Meaty savor • APPLE BUTTER Silky quality • SOY SAUCE Depth and color America's Test Kitchen is a 2,500-square-foot kitchen located just outside of Boston. It is the home of Cook's Country and Cook's Illustrated magazines and is the workday destination for more than three dozen test cooks, editors, and cookware specialists. Our mission is to test recipes until we understand how and why they work and arrive at the best version. We also test kitchen equipment and supermarket ingredients in search of brands that offer the best value and performance. You can watch us work by tuning in to America's Test Kitchen (www.americastestkitchen.com) or Cook's Country by America's Test Kitchen on public television.

Provided by @MakeItYours

Number Of Ingredients 17

After quartering, slice the onions pole to pole for substantial slices that will hold up to long cooking (see pictures below). Beef bones are stocked in the freezer or meat section of supermarkets.
Ingredients SOUP
2 pounds beef bones (see note)
4 tablespoons unsalted butter
6 large yellow onions (about 4 pounds), quartered and cut into ¼-inch-thick slices
Salt and pepper
1 tablespoon brown sugar
1 teaspoon minced fresh thyme
5 tablespoons all-purpose flour
¾ cup apple butter
¾ cup dry sherry
¼ cup soy sauce
2 cups low-sodium chicken broth
2 cups low-sodium beef broth
CHEESE CROUTONS
1 loaf French bread, cut into ½-inch slices
2½ cups shredded Gruyère cheese

Steps:

  • • 1. COOK ONIONS Arrange beef bones on paper towel-lined plate. Microwave until well browned, 8 to 10 minutes. Meanwhile, set slow cooker to high. Add butter, cover, and cook until melted. Add onions, 2 teaspoons salt, 1 teaspoon peper, brown sugar, and thyme. Stir flour, apple butter, sherry, and soy sauce together in small bowl until smooth. Pour over onions and toss to coat. Tuck bones under onions around edge of slow cooker. Cover and cook on high heat until onions are softened and deep golden brown, 10 to 12 hours. (Cooked onions can be refrigerated in airtight container for 1 day.)
  • • 2. FINISH SOUP Remove bones from slow cooker. Heat chicken and beef broth in microwave until beginning to boil. Stir into slow cooker. Season with salt and pepper.
  • • 3. MAKE CROUTONS Adjust oven rack to upper-middle position (about 6 inches from broiler element) and heat oven to 400 degrees. Arrange bread slices in single layer on baking sheet and bake until bread is golden at edges, about 10 minutes. Heat broiler. Divide cheese evenly among croutons and broil until melted and bubbly, 3 to 5 minutes.
  • • 4. SERVE SOUP Ladle soup into bowls and top each with 2 croutons. Serve.

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