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Best Blueberry French Toast Casserole

The Best Blueberry French Toast Casserole

This decadent casserole is a perfect make-ahead breakfast or brunch dish. It's packed with sweet blueberries and a buttery streusel topping, all layered on top of a rich custard-soaked bread.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 8

Ingredients
  

  • 1 loaf brioche or challah bread cut into 1-inch cubes (about 8 cups)
  • 2 cups fresh or frozen blueberries
  • 6 large eggs
  • 2 cups milk
  • 1/2 cup heavy cream
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon ground cinnamon
  • Pinch of salt
  • 1 tablespoon sugar for the custard

For the Streusel Topping

  • 1/2 cup all-purpose flour
  • 1/4 cup granulated sugar
  • 3 tablespoons cold unsalted butter cut into small pieces

Instructions
 

  • Grease a 9x13-inch baking dish. Arrange the bread cubes in the dish, slightly overlapping. Scatter blueberries evenly over the bread.
  • In a large bowl, whisk together eggs, milk, heavy cream, vanilla extract, cinnamon, salt, and sugar. Pour the custard mixture evenly over the bread and blueberries, pressing down gently to submerge the bread.
  • Cover and refrigerate for at least 2 hours, or preferably overnight.
  • In a medium bowl, combine flour and sugar. Cut in the cold butter using a pastry blender or your fingers until the mixture resembles coarse crumbs.
  • Preheat oven to 350°F (175°C). Remove the casserole from the refrigerator. Sprinkle the streusel topping evenly over the top.
  • Bake for 40-45 minutes, or until the top is golden brown and the center is set.
  • Let the casserole stand for a few minutes before serving. Drizzle with maple syrup or powdered sugar, and top with additional fresh blueberries or whipped cream, if desired.

Video

Notes

Bread: Day-old bread works best as it absorbs the custard more effectively.
Blueberries: Feel free to use a combination of fresh and frozen blueberries.
Make-Ahead: This casserole can be prepared ahead of time and refrigerated overnight, making it perfect for busy mornings.
Variations: Add other fruits to the casserole, such as raspberries, strawberries, or peaches. You can also add a touch of nutmeg or cardamom to the custard for extra flavor.