French toast casserole turns a loaf of sourdough into a warm, shareable breakfast with a soft vanilla-cinnamon center and a crisp buttery crumble. The 9-by-13-inch bake serves 12, takes 15 minutes to assemble, and finishes in about 50 minutes. It is generous enough for a holiday morning or brunch buffet, yet simple enough for a relaxed weekend breakfast when you want a make-ahead-friendly dish without standing over a griddle.
What this French toast casserole is and why it works
The egg, milk, and half-and-half mixture gives the bread a tender custard texture while sourdough keeps enough structure to hold its shape. Granulated sugar sweetens the custard, and brown sugar plus cinnamon brings a deeper caramel note. The separate crumble adds contrast across the top instead of leaving every bite soft.
Ingredients and preparation
- 1 loaf sourdough, 14–16 ounces, cut into bite-size pieces
- 8 large eggs
- 2 cups milk
- 1/2 cup half-and-half
- 1/2 cup granulated sugar
- 1/2 cup brown sugar for the custard
- 1 tablespoon vanilla extract
- 1 1/2 teaspoons ground cinnamon for the custard
- 1 stick cold unsalted butter
- 1/2 cup all-purpose flour
- 1/4 teaspoon salt
- 1/2 cup brown sugar for the crumble
- 1 teaspoon ground cinnamon for the crumble
How to make it
Start with bread pieces that are fairly even in size so they absorb the custard at the same rate. The mixture should coat the bread thoroughly, but gentle tossing matters: sourdough should stay in pieces rather than becoming a paste.
- Preheat the oven to 350°F. Coat a 9-by-13-inch baking dish with cooking spray. Whisk the eggs, milk, half-and-half, granulated sugar, first brown sugar, vanilla, and first cinnamon measurement in a large bowl.
- Add the bite-size bread pieces to the egg mixture and gently toss until coated and absorbed, taking care not to crumble the bread. Transfer it to the prepared baking dish.
- Make the topping by mixing the cold butter, flour, salt, second brown sugar, and second cinnamon measurement with a fork or your hands until a crumble forms. Scatter it over the casserole.
- Bake for about 50 minutes, until the center is set and the top is lightly browned.
Serving ideas
Cut the casserole into squares and serve it warm. Fresh berries, sliced bananas, or a spoonful of yogurt balance the buttery topping. For a brunch table, pair it with crisp bacon or breakfast sausage and coffee; the casserole provides the sweet centerpiece while the savory side keeps the meal balanced.
Because the casserole is already sweet and warmly spiced, toppings do not need to be elaborate. A light dusting of powdered sugar is enough for a special-occasion plate, while plain fruit keeps breakfast fresh. Serve smaller squares alongside eggs when the dish is part of a larger spread, or offer full portions with fruit for a simple family breakfast.
Tips and an optional variation
For the best texture, look for a set center rather than relying only on the color of the topping. If the top browns early, loosely cover the dish for the remaining baking time. Optional variation: add a small handful of chopped pecans to the crumble, clearly treating them as an extra rather than part of the primary recipe.
Keep the two brown sugar measurements separate while you gather ingredients: one sweetens the custard and the other belongs in the topping. The same is true of the cinnamon. Measuring them into two small bowls prevents the crumble spices from being mixed into the custard by accident and makes the assembly easier to follow.
Storage and reheating
Cool leftovers promptly, cover, and refrigerate. Reheat individual portions until hot in the center; a moderate oven keeps the crumble firmer than a microwave, while the microwave is convenient for a quick breakfast. Keep the casserole refrigerated and use leftovers within a few days.
Planning the breakfast
Set out the baking dish, mixing bowl, whisk, measuring cups, and a fork for the crumble before you begin. That small bit of organization keeps the custard and topping steps moving quickly. The bread should be cut before the eggs are whisked so it can go straight into the bowl and absorb the mixture evenly.
For a brunch, bake the casserole shortly before serving and let it stand briefly so the custard settles and the squares cut cleanly. If you are serving several dishes, keep this one covered loosely after baking and bring it out with a sharp serving spatula.
FAQs about French toast casserole
Can it be prepared ahead?
Yes. Assemble the casserole and topping ahead, refrigerate it covered, and allow the chilled dish a little extra time in the oven if needed. Check that the center is set before serving.
What bread works best?
Sourdough gives this version structure and a gently tangy flavor. Cut it into bite-size pieces so the custard can reach the interior without dissolving the bread.
How do I know it is done?
The top should be lightly browned and the center should look set rather than fluid when the dish is gently moved.
Serve this French toast casserole while the center is warm and the cinnamon crumble is still pleasantly crisp. Its straightforward prep and generous yield make it a dependable breakfast centerpiece.
French Toast Casserole with Cinnamon Crumble
Ingredients
Ingredients
- 1 loaf sourdough 14–16 ounces, cut into bite-size pieces
- 8 large eggs
- 2 cups milk
- 1/2 cup half-and-half
- 1/2 cup granulated sugar
- 1/2 cup brown sugar for the custard
- 1 tablespoon vanilla extract
- 1 1/2 teaspoons ground cinnamon for the custard
- 1 stick unsalted butter cold
- 1/2 cup all-purpose flour
- 1/4 teaspoon salt
- 1/2 cup brown sugar for the crumble
- 1 teaspoon ground cinnamon for the crumble
Instructions
Instructions
- Preheat the oven to 350°F. Coat a 9-by-13-inch baking dish with cooking spray. Whisk the eggs, milk, half-and-half, granulated sugar, first brown sugar, vanilla, and first cinnamon measurement in a large bowl.
- Add the bite-size bread pieces to the egg mixture and gently toss until coated and absorbed, taking care not to crumble the bread. Transfer it to the prepared baking dish.
- Make the topping by mixing the cold butter, flour, salt, second brown sugar, and second cinnamon measurement with a fork or your hands until a crumble forms. Scatter it over the casserole.
- Bake for about 50 minutes, until the center is set and the top is lightly browned.
