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Easy Overnight Blueberry French Toast Casserole

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A simple and comforting overnight French toast casserole featuring fresh blueberries, custardy bread, and a golden, slightly crispy top. Perfect for busy mornings or relaxed weekend brunches.

Ingredients

Scale
  • 8 cups day-old bread cubes (sourdough, French bread, or brioche)
  • 1 to 1 ½ cups fresh blueberries
  • 6 large eggs, room temperature
  • 2 ½ cups whole milk (600 ml)
  • ½ cup granulated sugar (100 g)
  • 1 ½ teaspoons vanilla extract
  • 1 teaspoon ground cinnamon
  • Pinch of salt
  • 2 tablespoons unsalted butter (for greasing and dotting on top)
  • Optional toppings: maple syrup, powdered sugar, Greek yogurt

Instructions

  1. Cut about 8 cups (roughly 300 grams) of day-old bread into 1-inch cubes. Place the cubes evenly in a greased 9×13-inch baking dish.
  2. Sprinkle 1 to 1 ½ cups of fresh blueberries evenly over the bread cubes without stirring.
  3. In a large bowl, whisk together 6 large eggs, 2 ½ cups whole milk, ½ cup granulated sugar, 1 ½ teaspoons vanilla extract, 1 teaspoon ground cinnamon, and a pinch of salt until combined and slightly frothy.
  4. Slowly pour the custard evenly over the bread and blueberries, pressing down lightly to help the bread absorb the liquid. Do not stir.
  5. Cut 2 tablespoons of unsalted butter into small pieces and scatter over the top of the casserole.
  6. Cover the dish tightly with aluminum foil and refrigerate overnight or for at least 6 hours.
  7. Preheat oven to 350°F (175°C). Remove foil and bake casserole for 45 to 55 minutes until the top is golden brown and custard is set. Cover loosely with foil if top browns too quickly.
  8. Let casserole cool for about 10 minutes before serving. Serve warm with optional maple syrup, powdered sugar, or Greek yogurt.

Notes

Use day-old sturdy bread like sourdough or brioche for best texture. Avoid very soft sandwich bread to prevent sogginess. If bread is dry, spritz lightly with water before soaking. Cover casserole tightly when refrigerating overnight. If top browns too fast, cover loosely with foil during baking. Frozen blueberries can be used but sprinkle them frozen to avoid sogginess. Variations include swapping fruit, adding chocolate chips, or using gluten-free/dairy-free substitutes.

Nutrition

Keywords: overnight French toast casserole, blueberry casserole, easy breakfast, brunch recipe, make-ahead breakfast, custard soaked bread

Find it online: https://lucastable.com/easy-overnight-blueberry-french-toast-casserole-recipe-for-perfect-breakfast/