9x9 French Toast Casserole Recipe for Easy Breakfast Baking

This 9×9 French toast casserole is the perfect make-ahead breakfast that combines the rich flavors of custardy bread with a crisp, cinnamon-spiced topping. It’s an effortless dish that works well for family mornings or brunch gatherings, offering a comforting texture that’s both soft inside and golden on top.

Ingredients

6 cups day-old bread cubes (about 1/2-inch pieces; brioche or challah preferred)
4 large eggs
1 1/2 cups whole milk
1/2 cup heavy cream
1/2 cup granulated sugar
2 teaspoons vanilla extract
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
Pinch of salt
2 tablespoons unsalted butter, melted (for greasing the pan)
Topping:
1/2 cup light brown sugar, packed
1/2 cup all-purpose flour
1 teaspoon ground cinnamon
1/4 teaspoon salt
1/4 cup unsalted butter, cold and cubed
Optional: 1/2 cup chopped pecans or walnuts

Instructions

Prepare the bread: Lightly grease a 9×9-inch baking dish with melted butter. Spread the bread cubes evenly in the dish.

Make the custard: In a large mixing bowl, whisk together eggs, whole milk, heavy cream, granulated sugar, vanilla extract, cinnamon, nutmeg, and salt until smooth and combined.
Soak the bread: Pour the custard mixture evenly over the bread cubes, pressing down gently to ensure the bread absorbs the liquid. Cover the dish tightly with plastic wrap and refrigerate for at least 2 hours, preferably overnight for best texture.
Prepare the topping: In a medium bowl, combine brown sugar, flour, cinnamon, and salt. Add the cold cubed butter and use a pastry cutter or your fingers to mix until the mixture resembles coarse crumbs. Stir in nuts if using.

Preheat the oven: When ready to bake, preheat your oven to 350°F (175°C).
Assemble and bake: Remove the plastic wrap and sprinkle the topping evenly over the soaked bread. Bake uncovered for 45-50 minutes or until the custard is set and the topping is golden brown and crisp.
Cool and serve: Let the casserole cool for 10 minutes before serving. This allows the custard to firm up slightly and makes slicing easier.

Tips

Bread choice matters: Use sturdy, day-old bread like brioche, challah, or French bread for the best soak and custard absorption. Avoid very soft or fresh bread that may become too mushy.
Make it ahead: This casserole is ideal for prepping the night before, which deepens the flavors and softens the bread perfectly.
Substitutions: Swap whole milk and heavy cream with half-and-half or a mix of milk and evaporated milk for a lighter version, though the custard will be less rich.

Don’t skip chilling: The resting period in the fridge is crucial for the bread to absorb the custard fully, resulting in a creamy interior rather than a dry bake.

Serving Suggestions

Serve slices warm with a drizzle of maple syrup or honey for added sweetness. Fresh berries, sliced bananas, or a dollop of whipped cream complement the custardy texture beautifully. For a savory balance, pair with crispy bacon or sausage links. A dusting of powdered sugar or a light spread of butter adds a nice finishing touch.

Variations

Berry French Toast Casserole: Fold in 1 cup of fresh or frozen blueberries or raspberries into the bread before soaking. This adds a fruity brightness and color contrast.

Chocolate Chip Twist: Sprinkle 1/2 cup of chocolate chips over the bread before pouring the custard for a sweeter, indulgent version.

Apple Cinnamon: Add 1 cup of peeled, diced apples and an extra 1/2 teaspoon of cinnamon to the custard mixture for a fall-inspired casserole.

Gluten-Free Option: Use gluten-free bread and ensure all other ingredients are certified gluten-free. Baking time may vary slightly.

Storage and Reheating

Store leftover casserole tightly covered in the refrigerator for up to 4 days. To reheat, place individual portions on a microwave-safe plate and microwave for 1-2 minutes until warmed through. Alternatively, reheat in a 350°F (175°C) oven for 10-15 minutes to restore crispiness to the topping.

This casserole can also be frozen before baking: cover tightly with foil and freeze for up to 2 months. Thaw overnight in the refrigerator, then bake as directed, adding 5-10 extra minutes to the baking time.

Frequently Asked Questions

Can I use fresh bread instead of day-old bread?
Fresh bread can be used, but it tends to absorb liquid unevenly and may turn mushy. Day-old bread is drier and holds up better, creating a more structured and custardy casserole.

Do I have to soak the casserole overnight?
While overnight soaking yields the best texture and flavor, a minimum of 2 hours in the refrigerator will still produce a tasty dish. The longer soak allows the custard to fully penetrate the bread.

How do I know when the casserole is fully cooked?
The casserole is done when the custard is set and no longer jiggly in the center. The topping should be golden brown and crisp. You can test doneness by inserting a knife or toothpick into the center—it should come out clean.

Can I prepare this in a larger pan?
Yes, but adjust the ingredient quantities accordingly. For example, a 9×13-inch pan requires roughly 1.5 to 2 times the recipe amounts. Baking time may also increase by 10-15 minutes; check for doneness as described.

Is it possible to make this dairy-free?
You can substitute dairy milk and cream with unsweetened almond milk or oat milk and use non-dairy butter or coconut oil for greasing and the topping. The texture will be slightly different but still delicious.

Can I add mix-ins like nuts or dried fruit?
Absolutely! Chopped nuts, dried cranberries, or raisins can be mixed in with the bread before soaking. Just be mindful not to overload the casserole to maintain even cooking and texture.

This 9×9 French toast casserole offers a straightforward, crowd-pleasing breakfast option that’s easily customized. Its balance of creamy custard and crunchy topping makes it a satisfying start to any day.

9×9 French Toast Casserole Recipe for Easy Breakfast Baking