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Best Blueberry French Toast Casserole

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Blueberry French toast casserole is a comforting, make-ahead breakfast bake made with cubes of soft bread soaked in a vanilla-cinnamon custard, loaded with blueberries, and finished with a warm blueberry topping. It’s perfect for brunch, holidays, or a special weekend treat.

Ingredients

  • 1 loaf French bread or brioche, cut into cubes (about 6 cups)
  • 6 large eggs
  • 2 cups milk (or 1 cup milk + 1 cup cream)
  • 1 tsp vanilla extract
  • 1 tsp ground cinnamon
  • 1/4 cup maple syrup or 1/3 cup granulated sugar
  • 1 1/2 cups fresh or frozen blueberries
  • 1 cup blueberries (for topping)
  • 1/4 cup sugar (for topping)
  • 1 tbsp cornstarch
  • 1/4 cup water
  • 1 tbsp lemon juice
  • Optional: powdered sugar, whipped cream, maple syrup (for serving)

Instructions

  1. Grease a 9×13-inch baking dish and add cubed bread and blueberries in an even layer.
  2. In a large bowl, whisk together eggs, milk, vanilla, cinnamon, and maple syrup or sugar.
  3. Pour custard evenly over the bread, pressing down slightly to soak. Cover and refrigerate for at least 4 hours or overnight.
  4. Preheat oven to 350°F (175°C). Let casserole sit at room temp for 30 minutes before baking.
  5. Bake uncovered for 45–50 minutes, until puffed and golden.
  6. While baking, prepare blueberry topping: combine blueberries, sugar, cornstarch, water, and lemon juice in a saucepan. Simmer over medium heat until thickened and jammy, about 5–7 minutes.
  7. Serve casserole warm with blueberry topping, and optional powdered sugar, whipped cream, or maple syrup.

Notes

  • Add cream cheese cubes for a cheesecake-style variation.
  • Swap in raspberries or strawberries if out of blueberries.
  • Add lemon zest to the custard for a citrusy twist.
  • Make dairy- and gluten-free by using almond milk and gluten-free bread.
  • Prepare the blueberry topping ahead and reheat before serving.

Nutrition

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