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Cozy Overnight French Toast Casserole with Easy Brown Sugar Streusel

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A warm and comforting French toast casserole soaked overnight in a rich custard and topped with a buttery brown sugar streusel. Perfect for easy weekend breakfasts or brunches.

Ingredients

Scale
  • 8 cups bread cubes (day-old brioche or challah recommended)
  • 6 large eggs (room temperature)
  • 2 cups whole milk (or almond milk for dairy-free option)
  • 1/2 cup heavy cream (optional, can be replaced with extra milk)
  • 3/4 cup granulated sugar
  • 2 teaspoons pure vanilla extract
  • 1 teaspoon ground cinnamon
  • 1/4 teaspoon salt
  • 3/4 cup light brown sugar, packed
  • 1/2 cup all-purpose flour
  • 1/2 cup cold unsalted butter, cubed
  • 1 teaspoon ground cinnamon
  • Pinch of salt
  • Optional add-ins: 1/2 cup chopped pecans or walnuts
  • Optional add-ins: 1 cup fresh or frozen berries

Instructions

  1. Cut day-old bread into 1-inch cubes. If using fresh bread, toast cubes at 300°F for 10 minutes to dry out. Place cubes evenly in a 9×13 inch baking dish.
  2. In a large bowl, whisk together eggs, whole milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt until smooth.
  3. Pour custard mixture evenly over bread cubes. Gently press bread down to absorb custard. Cover tightly with plastic wrap or foil and refrigerate overnight or at least 6 hours.
  4. In a medium bowl, combine brown sugar, flour, ground cinnamon, and salt. Add cold butter cubes and mix with a pastry cutter or fingers until mixture resembles coarse crumbs.
  5. Preheat oven to 350°F about 30 minutes before baking.
  6. Sprinkle streusel topping evenly over soaked bread. Add optional nuts or berries if desired.
  7. Bake casserole for 45-55 minutes until top is golden brown and crisp. Insert a knife in the center; it should come out mostly clean. Tent with foil if browning too fast but not cooked through.
  8. Let casserole rest for 10 minutes before slicing and serving.

Notes

Use day-old bread for best texture; toast fresh bread if needed. Cover casserole tightly when soaking overnight to prevent drying. Cold butter in streusel creates crumbly texture. Tent with foil if top browns too quickly. Let rest before serving for easier slicing. Gluten-free and vegan adaptations possible with substitutions.

Nutrition

Keywords: French toast casserole, overnight casserole, brown sugar streusel, brunch recipe, easy breakfast, comfort food

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