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Easy Overnight Sourdough French Toast Casserole Recipe for Perfect Breakfast

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A no-fuss, overnight French toast casserole using sourdough bread that delivers a custardy center with crispy edges, perfect for lazy weekends or brunch guests.

Ingredients

Scale
  • 8 cups sourdough bread, cubed (day-old or slightly stale)
  • 6 large eggs (room temperature)
  • 2 cups whole milk
  • 1 cup heavy cream
  • ⅓ cup granulated sugar
  • 2 teaspoons pure vanilla extract
  • 1 tablespoon ground cinnamon (plus extra for topping)
  • ½ teaspoon salt
  • 2 tablespoons butter (for greasing and dotting)
  • Powdered sugar (optional, for dusting)
  • Maple syrup (for serving)

Instructions

  1. Cube the sourdough bread into roughly 1-inch cubes and toss lightly 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 fully combined and slightly frothy.
  3. Slowly pour the custard mixture evenly over the bread cubes, pressing down gently to help the bread soak up the custard.
  4. Cut butter into small pieces and scatter evenly over the top of the casserole. Cover tightly with aluminum foil.
  5. Refrigerate the covered casserole for at least 8 hours or overnight to allow the bread to soak up the custard.
  6. Preheat oven to 350°F (175°C). Remove foil and bake uncovered for 45-50 minutes until the top is golden brown and custard is set. If browning too quickly, loosely cover with foil halfway through baking.
  7. Let the casserole rest for 5-10 minutes before dusting with powdered sugar and serving with warm maple syrup.

Notes

Use day-old or slightly stale sourdough bread for best soaking results. If bread is very fresh, toast lightly before using to avoid sogginess. Cover casserole with foil for the first 30 minutes of baking to prevent drying out. Customize with berries or nuts before baking for added texture. Can be adapted for gluten-free or dairy-free diets by substituting ingredients accordingly.

Nutrition

Keywords: overnight French toast casserole, sourdough French toast, easy breakfast casserole, brunch recipe, custardy French toast

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