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Overhead shot of French toast casserole in a square white dish, on a gray napkin and forks lying nearby.
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4.86 from 7 votes

Overnight French Toast Casserole

Overnight French Toast Casserole is THE BEST brunch dish. Crusty bread gets soaked in an egg custard, and then topped with a delicious crumble. Prep it the night before and then brunch is a breeze the next day!
Course Breakfast
Cuisine American
Keyword french toast casserole, make ahead dish, overnight casserole
Prep Time 25 minutes
Cook Time 40 minutes
Total Time 1 hour 5 minutes
Servings 6 servings
Calories 441kcal
Author Sue Ringsdorf

Ingredients

For the casserole:

  • 7-8 cups cubed bread - French bread or sourdough bread
  • 5 large eggs
  • 1 1/2 cups 1% milk
  • 1 Tablespoon vanilla extract
  • 1/3 cup brown sugar
  • 1 teaspoon cinnamon
  • 1/2 teaspoon nutmeg

For the topping:

  • 1/4 cup all-purpose flour
  • 1/4 cup brown sugar
  • 1 teaspoon cinnamon
  • 1/4 teaspoon kosher salt
  • 1/4 cup unsalted butter - cubed
  • butter and warm syrup - to serve
  • powdered sugar dusting

Instructions

  • Prep. Prep a 9×9 casserole dish with baking spray.
  • Cube bread. Slice some crusty bread into bite-sized cubes. We like to use our leftover Chewy French Bread. Add to casserole dish.
    7-8 cups cubed bread
  • Make custard. In a medium bowl, combine the custard ingredients – the eggs, milk, vanilla, brown sugar, cinnamon, and nutmeg.
    5 large eggs, 1 1/2 cups 1% milk, 1 Tablespoon vanilla extract, 1/3 cup brown sugar, 1 teaspoon cinnamon, 1/2 teaspoon nutmeg
  • Add custard to bread. Pour the custard evenly over the bread.
  • Prep topping. In a small bowl, mix together the flour, brown sugar, cinnamon, nutmeg, and salt. Add the cold butter and use your fingers to combine until mixture is crumbled. Sprinkle topping over the top of the bread layer.
    1/4 cup all-purpose flour, 1/4 cup brown sugar, 1 teaspoon cinnamon, 1/4 teaspoon kosher salt, 1/4 cup unsalted butter
  • Bake. In a preheated oven, bake casserole uncovered for 35-40 minutes, until piping hot and bubbly.
  • Serve. Serve French Toast Bake with a drizzle of butter, some warm syrup, or a dusting of powdered sugar.
    butter and warm syrup , powdered sugar dusting

Notes

To make this casserole ahead of time:
  • After the egg custard is poured over the bread, cover tightly with cling wrap and store in the refrigerator overnight (or for a couple of hours).
  • The following day (or when ready to eat), prepare the crumbly topping and sprinkle over top the casserole. Bake as directed.
  • Likewise, you could prepare the topping ahead of time and store in the refrigerator as well.

Nutrition

Calories: 441kcal | Carbohydrates: 60g | Protein: 15g | Fat: 15g | Saturated Fat: 7g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Trans Fat: 0.3g | Cholesterol: 178mg | Sodium: 496mg | Potassium: 286mg | Fiber: 3g | Sugar: 28g | Vitamin A: 580IU | Vitamin C: 0.2mg | Calcium: 207mg | Iron: 4mg