French Toast Casserole

Do not substitute low-fat or skim milk for the whole milk in this recipe. Walnuts can be substituted for the pecans. Be sure to use supermarket-style french bread with a thin crust and fluffy crumb; artisan loaves with a thick crust and chewy crumb don’t work well here. The casserole needs to sit in the refrigerator, well covered, for at least 8 hours in order to achieve the desired consistency, and it can be made up to 24 hours in advance.

Casserole
1 loaf (16-ounce) supermarket French bread, torn into 1-inch pieces
cooking spray
8 large eggs
2 1/2 cups whole milk
1 1/2 cups heavy cream
1 tablespoon granulated sugar
2 teaspoons vanilla extract
1/2 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg

Topping
8 tablespoons (1 stick) unsalted butter, softened
1 1/3 cups packed (9 1/3 ounces) light brown sugar
3 tablespoons light corn syrup
2 cups pecans, chopped coarse

Adjust 2 oven racks to the upper-middle and lower-middle positions and heat the oven to 325 degrees. Spread the bread out over 2 baking sheets and bake until dry and light golden brown, about 25 minutes, switching and rotating the baking sheets halfway through the baking time. Let the bread cool completely.

Coat a 13 by 9-inch baking dish with cooking spray and pack the dried bread into the dish. Whisk the eggs in a large bowl until combined and then whisk in the milk, cream, granulated sugar, vanilla, cinnamon, and nutmeg. Pour the egg mixture evenly over the bread and press on the bread lightly to submerge.

Stir the butter, brown sugar, and corn syrup together until smooth, then stir in the pecans.

Transfer the topping to an airtight container and wrap the dish tightly with plastic wrap. Refrigerate the topping and casserole separately for at least 8 hours or up to 24 hours.

Adjust an oven rack to the middle position and heat the oven to 350 degrees. Unwrap the casserole and sprinkle the topping evenly over the top, breaking apart any large pieces with your fingers. Place the casserole on a rimmed baking sheet and bake until puffed and golden, about 1 hour. Serve immediately.

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