Overnight French Toast Casserole

This overnight French toast casserole combines soft brioche bread with a cinnamon-vanilla custard and buttery brown sugar streusel. Assemble it the night before, refrigerate it, and bake it the following morning for a convenient family breakfast.

It works particularly well for Christmas morning, Easter brunch, weekend gatherings, and occasions when you want to serve several people without cooking individual slices of French toast.

Why You’ll Love This Recipe

Prepared the night before.
Soft custardy center and golden topping.
Buttery cinnamon streusel.
Suitable for feeding a group.
Convenient for holiday mornings.
Made with familiar ingredients.
Delicious with maple syrup and berries.

Ingredients You’ll Need

For the French Toast Casserole

One 14–16-ounce loaf brioche or challah bread.
8 large eggs.
2 cups whole milk.
½ cup heavy cream.
½ cup packed light brown sugar.
¼ cup granulated sugar.
2 teaspoons vanilla extract.
1½ teaspoons ground cinnamon.
¼ teaspoon ground nutmeg.
¼ teaspoon salt.
Butter for greasing the baking dish.

For the Streusel Topping

½ cup all-purpose flour.
½ cup packed light brown sugar.
1 teaspoon ground cinnamon.
¼ teaspoon salt.
6 tablespoons cold unsalted butter, cut into small pieces.
½ cup chopped pecans, optional.

Optional Toppings

Maple syrup.
Powdered sugar.
Fresh strawberries.
Blueberries.
Whipped cream.
Additional chopped pecans.

Ingredient Notes

Brioche or Challah

Brioche and challah absorb custard while maintaining a soft, rich texture. Slightly stale bread works particularly well because it can absorb more liquid without becoming excessively soft.

French bread can also be used, although the texture will be firmer.

Eggs

Eggs provide structure to the custard. Whisk them thoroughly so the whites and yolks distribute evenly.

Whole Milk and Heavy Cream

The combination produces a rich custard. You can use only whole milk for a lighter result, but the finished casserole will be less rich.

Brown Sugar

Brown sugar adds sweetness and caramel flavor to both the custard and streusel.

Cinnamon and Nutmeg

These spices give the casserole its warm breakfast flavor. Nutmeg is optional but adds depth.

Pecans

Pecans add crunch to the topping. Leave them out if you prefer a nut-free casserole, while also checking the remaining ingredients for your dietary needs.

How to Make Overnight French Toast Casserole

Step 1: Prepare the Bread

Cut the brioche or challah into approximately 1-inch cubes.

If the bread is very fresh, spread the cubes on a baking sheet and allow them to dry at room temperature for a few hours.

Slightly dry bread absorbs the custard more effectively.

Step 2: Fill the Baking Dish

Grease a 9 × 13-inch baking dish with butter.

Arrange the bread cubes evenly inside the dish without packing them down too firmly.

Step 3: Make the Custard

Add the eggs to a large mixing bowl and whisk until completely combined.

Add the milk, heavy cream, brown sugar, granulated sugar, vanilla, cinnamon, nutmeg, and salt.

Whisk until the sugar begins to dissolve and the mixture is evenly blended.

Step 4: Soak the Bread Overnight

Pour the custard slowly and evenly over the bread cubes.

Press the bread down gently so the upper pieces make contact with the liquid.

Cover the baking dish securely and refrigerate for at least 8 hours, or overnight.

Keep the egg-based casserole refrigerated throughout the soaking period.

Step 5: Make the Streusel

Combine the flour, brown sugar, cinnamon, and salt in a small bowl.

Add the cold butter and work it into the mixture with a pastry cutter, fork, or fingertips until crumbs form.

Stir in the optional pecans.

Cover and refrigerate the streusel separately overnight.

Step 6: Prepare for Baking

The following morning, remove the casserole from the refrigerator while the oven preheats to 350°F.

If the baking dish is made of glass, follow its manufacturer’s guidance about transferring it from the refrigerator to a hot oven.

Sprinkle the chilled streusel evenly over the soaked bread.

Step 7: Bake the Casserole

Cover the dish loosely with foil and bake for approximately 30 minutes.

Remove the foil and continue baking for approximately 15 to 25 minutes, until the top is golden and the center is set.

An egg-based casserole should reach 160°F in the center.

If you prefer a softer center, begin checking earlier. For a firmer texture, bake slightly longer while avoiding excessive browning.

Step 8: Rest and Serve

Allow the casserole to rest for approximately 10 minutes.

Dust lightly with powdered sugar and serve with maple syrup, berries, or whipped cream.

Tips for the Best French Toast Casserole

Use Slightly Dry Bread

Fresh, extremely soft bread can become overly wet after soaking overnight.

Cut Even Bread Cubes

Evenly sized pieces absorb the custard and bake more consistently.

Whisk the Eggs Thoroughly

Completely blended eggs create a more uniform custard.

Refrigerate the Streusel Separately

Keeping the topping separate helps maintain its crumbly texture.

Cover During the First Part of Baking

Foil allows the center to heat before the topping becomes too dark.

Let the Casserole Rest

Resting helps the custard settle and makes the portions easier to serve.

Recipe Variations

Blueberry French Toast Casserole

Add fresh blueberries between the bread layers before pouring over the custard.

Apple Cinnamon French Toast Bake

Add small pieces of sautéed cinnamon apples to the casserole.

Chocolate Chip French Toast Casserole

Sprinkle semisweet chocolate chips between the bread cubes.

Cream Cheese French Toast Casserole

Add small pieces of chilled cream cheese throughout the bread.

Pecan French Toast Bake

Increase the chopped pecans in the streusel topping.

French Toast Casserole Without Streusel

Leave out the streusel and sprinkle cinnamon sugar over the casserole before baking.

What to Serve With French Toast Casserole

Serve it with:

Maple syrup.
Fresh berries.
Sliced bananas.
Scrambled eggs.
Breakfast sausage.
Bacon.
Greek yogurt.
Fruit salad.
Whipped cream.
Hot coffee.
Apple cider.
Orange juice.

For a holiday brunch, serve the casserole with scrambled eggs, fresh fruit, and coffee.

Can You Bake It Without Soaking Overnight?

Yes. Allow the assembled casserole to soak in the refrigerator for at least 30 to 60 minutes.

The texture may be less uniform than a casserole soaked overnight.

How to Store and Reheat Leftovers

Allow leftovers to cool before transferring them to an airtight container.

Refrigerate promptly and use within 3 to 4 days.

Reheat individual portions in the microwave or warm a larger portion in a covered baking dish. Heat egg-based leftovers thoroughly to 165°F.

Can You Freeze French Toast Casserole?

Yes. Cool the baked casserole completely and divide it into portions.

Store the portions in freezer-safe containers and label them with the date.

Thaw overnight in the refrigerator and reheat thoroughly before serving.

Frequently Asked Questions

Why Is My French Toast Casserole Soggy?

The bread may have been too fresh, the pieces may have been too small, or the casserole may need additional baking time.

Can I Use Regular Sandwich Bread?

Yes, but the casserole will have a softer and less rich texture. Thick slices generally work better.

How Long Can It Soak?

An overnight soak of approximately 8 to 12 hours is suitable. Keep the casserole covered and refrigerated.

Can I Use Only Milk?

Yes. Replace the cream with additional whole milk for a lighter custard.

Do I Need to Bring It to Room Temperature?

A short rest while the oven preheats can reduce the chill. Follow the baking dish manufacturer’s thermal-shock guidance.

How Do I Know When It Is Done?

The top should be golden, the center should look set, and the internal temperature should reach 160°F.

More Breakfast and Brunch Recipes

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