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Overnight Baked French Toast Casserole for Easy Brunch

Close-up of a golden, fluffy square slice of baked french toast drizzled with syrup.

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Make your mornings simple with this make-ahead baked French toast casserole. Prep it the night before, wake up, and bake a fluffy, cinnamon-spiced breakfast perfect for family or guests.

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
  • 2 teaspoons vanilla extract
  • 2 teaspoons ground cinnamon
  • 1/2 teaspoon ground nutmeg
  • 1/4 teaspoon salt
  • 1/2 cup brown sugar (for topping)
  • 1/4 cup cold butter, cut into small pieces (for topping)

Instructions

  1. Lightly 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, cinnamon, nutmeg, and salt until fully combined. This is your custard mixture.
  3. Pour the custard mixture slowly and evenly over the bread cubes, pressing down gently to help the bread absorb the liquid.
  4. Cover the baking dish tightly with plastic wrap. Refrigerate for at least 4 hours, or preferably overnight. This step is key for a fluffy texture.
  5. When ready to bake, preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius). Remove the plastic wrap.
  6. In a small bowl, mix the brown sugar and the cold butter pieces until a crumbly streusel forms. Sprinkle this topping evenly over the soaked bread.
  7. Bake for 45 to 55 minutes, or until the casserole is puffed, golden brown on top, and the center is set (no liquid remains when poked).
  8. Let the baked French toast casserole rest for 10 minutes before slicing and serving. Serve warm with maple syrup.

Notes

  • For a richer flavor, use day-old bread, as it absorbs the custard better without becoming mushy.
  • If you skip the overnight soak, let the assembled casserole sit at room temperature for 30 minutes before baking.
  • This recipe works well for holiday mornings because all the prep is done ahead of time.

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