Overnight French Toast Casserole with Brown Sugar Crumble Recipe
Introduction
This Overnight French Toast Casserole is an effortless and delicious brunch dish that will please any crowd. By prepping it the night before, your morning will be stress-free and full of warm, comforting flavors.

Ingredients
- French Toast Casserole:
- 8 large eggs
- 3 cups half and half
- ¼ cup dark brown sugar, packed
- ½ tablespoon vanilla extract
- 1 teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
- ½ teaspoon salt
- 1 (12-16 oz) baguette, cubed into 1-inch chunks (at least 1 day old)
- Crumble:
- 2 cups old fashioned oats
- 2 cups all purpose flour
- 1 cup pecans, roughly chopped
- 2 cups dark brown sugar, packed
- ½ tablespoon ground cinnamon
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- 1 cup unsalted butter, melted
- Toppings (optional):
- Maple syrup
- Sliced strawberries
- Whipped cream
Instructions
- Step 1: Grease a 9×13 inch baking dish with cooking spray and set aside.
- Step 2: In a very large bowl, whisk together the eggs, half and half, brown sugar, vanilla extract, cinnamon, nutmeg, and salt until well combined.
- Step 3: Gently fold in the cubed baguette pieces, making sure they are evenly coated.
- Step 4: Pour the mixture into the prepared baking dish, cover with aluminum foil, and refrigerate overnight or for at least 4 hours.
- Step 5: Preheat the oven to 350ºF (175ºC). Remove the casserole from the refrigerator and take off the foil while the oven heats.
- Step 6: In a large bowl, combine oats, flour, pecans, brown sugar, cinnamon, baking powder, baking soda, salt, and melted butter. Mix until crumbly and well blended.
- Step 7: Sprinkle the crumble evenly over the top of the casserole.
- Step 8: Bake uncovered for 40 minutes or until the casserole is puffed and the crumble topping is lightly golden.
- Step 9: Serve warm, topped with maple syrup, sliced strawberries, and whipped cream if desired. Enjoy!
Tips & Variations
- Use day-old bread for better absorption and texture; fresh bread can make the casserole soggy.
- Try different nuts like walnuts or almonds for a varied crunch in the crumble topping.
- Add a splash of bourbon or orange zest to the egg mixture for extra flavor.
- For a gluten-free version, substitute gluten-free flour and oats in the crumble.
Storage
Store leftovers covered in the refrigerator for up to 4 days. To reheat, warm portions in the microwave or oven until heated through. For longer storage, freeze the casserole tightly wrapped for up to 2 months; thaw overnight in the refrigerator before reheating.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make this casserole the same day I want to serve it?
While you can prepare it a few hours ahead, allowing it to soak overnight in the refrigerator improves the texture and flavor significantly.
What type of bread works best for this recipe?
A day-old baguette is ideal because its firm texture absorbs the custard without becoming mushy. You can also use other sturdy breads like challah or brioche if they’re at least a day old.
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Overnight French Toast Casserole with Brown Sugar Crumble Recipe
- Total Time: 4 hours 55 minutes (including refrigeration)
- Yield: 16 servings 1x
Description
This Overnight French Toast Casserole is a delicious and easy brunch recipe perfect for serving a crowd. Prepare it the night before, refrigerate, and simply bake in the morning to enjoy a warm, comforting dish topped with a crunchy brown sugar pecan crumble. Perfect for special occasions or weekend breakfasts.
Ingredients
French Toast Casserole
- 8 large eggs
- 3 cups half and half
- ¼ cup dark brown sugar, packed
- ½ tablespoon vanilla extract
- 1 teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
- ½ teaspoon salt
- 1 (12-16 oz) baguette, cubed into 1-inch chunks (preferably at least 1 day old)
Crumble
- 2 cups old fashioned oats
- 2 cups all-purpose flour
- 1 cup pecans, roughly chopped
- 2 cups dark brown sugar, packed
- ½ tablespoon ground cinnamon
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- 1 cup unsalted butter, melted
Toppings (Optional)
- Maple syrup
- Strawberries, sliced
- Whipped cream
Instructions
- Prepare Baking Dish: Grease a 9×13 inch baking dish with cooking spray and set it aside.
- Mix Wet Ingredients: In a very large bowl, whisk together the eggs, half and half, brown sugar, vanilla extract, ground cinnamon, ground nutmeg, and salt until fully combined.
- Add Bread: Gently fold the cubed baguette pieces into the egg mixture, ensuring the bread is evenly coated.
- Refrigerate Overnight: Pour the mixture into the prepared baking dish, cover tightly with aluminum foil, and refrigerate overnight or for at least 4 hours to allow the bread to soak and flavors to meld.
- Preheat Oven & Prepare Crumble: Preheat your oven to 350ºF (175ºC). Remove the casserole from the refrigerator and take off the foil. In a large bowl, mix together rolled oats, all-purpose flour, chopped pecans, brown sugar, ground cinnamon, baking powder, baking soda, salt, and melted butter until the mixture is evenly combined and crumbly.
- Add Crumble Topping: Evenly sprinkle the crumble mixture over the surface of the soaked bread casserole.
- Bake: Bake uncovered for 40 minutes in the preheated oven, until the casserole is puffed up and the crumble topping is golden and crisp.
- Serve: Remove from the oven and serve warm topped with optional maple syrup, sliced strawberries, and whipped cream if desired for added sweetness and flavor.
Notes
- Use day-old baguette or bread for best texture to absorb the custard without becoming mushy.
- The casserole can be refrigerated for up to 4 days before baking.
- You can freeze the baked casserole for up to 2 months; reheat in microwave or oven until warmed through.
- Feel free to substitute pecans with walnuts or almonds based on preference.
- Adjust cinnamon and nutmeg amounts to taste for a more or less spiced flavor.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Breakfast
- Method: Baking
- Cuisine: American
Keywords: brown sugar crumble, french toast, casserole, brunch, overnight, baked french toast

