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Overnight French Toast Casserole

This foolproof baked French toast casserole is prepped the night before for stress-free mornings. Custardy interior, crispy cinnamon topping - pure breakfast bliss.
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Prep Time:20 minutes
Cook Time:50 minutes
Additional Time:4 hours
Total Time:5 hours 10 minutes
Course: Breakfast
Cuisine: American
Keyword: baked french toast, holiday brunch recipe, overnight french toast
Servings: 8 Servings

Ingredients

French Toast:

  • 1 loaf 16 oz sourdough bread, cubed
  • 8 large eggs
  • 2 cups whole milk
  • ½ cup heavy cream
  • 1 tbsp vanilla extract
  • ¾ cup granulated sugar

Topping:

  • ½ cup all-purpose flour
  • ½ cup packed brown sugar
  • 1 tsp ground cinnamon
  • ¼ tsp salt
  • ½ cup cold unsalted butter cubed

Instructions

  • Grease 9x13 baking dish. Arrange bread cubes evenly in dish.
  • Whisk eggs, milk, cream, vanilla and sugar in large bowl. Pour over bread.
  • Press bread down gently to submerge. Cover tightly, refrigerate 4+ hours (overnight best).
  • For topping: Mix flour, brown sugar, cinnamon and salt. Cut in butter until crumbly. Refrigerate separately.
  • Preheat oven to 350°F. Sprinkle topping evenly over casserole.
  • Bake uncovered 45-60 minutes until golden and set (less time for softer texture).
  • Let stand 5 minutes before serving with maple syrup.

Notes

  • Bread Tip: Stale or lightly toasted bread absorbs best
  • Make Ahead: Assemble completely (without baking) up to 24 hours in advance
  • Freezer Friendly: Freeze unbaked casserole (without topping) for up to 2 months
  • Variations: Add 1 cup berries, diced apples, or chocolate chips before baking
  • Serving Suggestion: Dust with powdered sugar and serve with warm maple syrup
Nutrition (auto-calculated):
Calories: 564 | Carbs: 72g | Protein: 15g | Fat: 25g | Saturated Fat: 14g | Cholesterol: 218mg | Sodium: 599mg | Fiber: 2g | Sugar: 38g