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Ultimate Make-Ahead Overnight Baked French Toast Casserole

A square slice of baked french toast with a thick, gooey cinnamon streusel topping on a white plate.

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A simple, make-ahead baked French toast casserole perfect for feeding a crowd on weekend mornings or holidays.

Ingredients

Scale
  • 1 loaf (about 1 pound) thick-cut bread (like brioche or challah), cut into 1-inch cubes
  • 12 large eggs
  • 2 cups whole milk
  • 1 cup heavy cream
  • 1/2 cup granulated sugar
  • 1 tablespoon vanilla extract
  • 2 teaspoons ground cinnamon
  • 1/2 teaspoon ground nutmeg
  • 1/4 teaspoon salt
  • 1/2 cup butter, melted (for topping)
  • 1/2 cup brown sugar, packed (for topping)
  • 1 cup all-purpose flour (for topping)
  • 1 teaspoon ground cinnamon (for topping)

Instructions

  1. Grease a 9×13 inch baking dish. Arrange the bread cubes evenly in the prepared dish.
  2. In a large bowl, whisk together the eggs, milk, heavy cream, granulated sugar, vanilla extract, 2 teaspoons of cinnamon, nutmeg, and salt until well combined.
  3. Pour the custard mixture evenly over the bread cubes. Gently press the bread down to help it absorb the liquid.
  4. Cover the dish tightly with plastic wrap and refrigerate for at least 4 hours, or preferably overnight.
  5. Preheat your oven to 350°F (175°C).
  6. Prepare the crumble topping: In a medium bowl, combine the melted butter, brown sugar, flour, and 1 teaspoon of cinnamon. Mix with a fork until coarse crumbs form.
  7. Remove the plastic wrap from the casserole. Sprinkle the crumble topping evenly over the soaked bread.
  8. Bake for 45 to 55 minutes, or until the casserole is puffed, golden brown, and the center is set (a knife inserted near the center comes out mostly clean).
  9. Let the casserole rest for 10 minutes before slicing and serving.

Notes

  • For extra flavor, you can add 1 cup of fresh or frozen berries over the bread before pouring the custard.
  • If you are short on time, let the bread soak for at least 30 minutes at room temperature before baking.
  • Serve with maple syrup or powdered sugar for extra sweetness.

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