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A delicious slice of Best Blueberry French Toast Casserole on a white plate, with a crumb topping and visible blueberries.

Best Blueberry French Toast Casserole

This make-ahead breakfast casserole is perfect for busy families and brunch enthusiasts. It combines convenience with delicious flavor, offering a sweet and comforting meal that's ideal for gatherings.
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Prep Time 20 minutes
Cook Time 50 minutes
Refrigeration Time 12 hours
Total Time 13 hours 10 minutes
Servings: 8 servings
Course: Breakfast, Brunch
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

For the Casserole
  • 1 (12–14-ounce/340–400g) loaf French bread, sourdough bread, brioche, or challah
  • 1 cup fresh or frozen blueberries
  • 2 cups whole milk
  • 8 large eggs
  • 1/2 cup heavy cream
  • 1/2 cup packed light brown sugar
  • 2 teaspoons pure vanilla extract
  • 2 teaspoons ground cinnamon
  • 1 teaspoon fresh lemon zest
  • pinch salt
Streusel Topping
  • 1/3 cup packed light or dark brown sugar
  • 1/3 cup all-purpose flour spooned & leveled
  • 1/2 teaspoon ground cinnamon
  • 6 Tablespoons unsalted butter, cold and cubed
Optional Toppings
  • extra blueberries

Equipment

  • 9x13 inch baking pan
  • Pastry blender or two forks
  • Medium bowl

Method
 

  1. Grease a 9x13-inch pan. Cut the bread into 1-inch cubes. Spread the cubes in the pan and top evenly with blueberries.
  2. Whisk together the milk, eggs, cinnamon, brown sugar, vanilla, lemon zest, and salt until no brown sugar lumps remain. Pour this mixture over the bread and blueberries. Cover the pan tightly and refrigerate for at least 3 hours, or preferably overnight.
  3. Preheat your oven to 350°F (177°C). Remove the pan from the refrigerator.
  4. Prepare the streusel topping: In a medium bowl, whisk together the brown sugar, flour, and cinnamon. Cut in the cold butter using a pastry blender or two forks until the mixture resembles coarse crumbs. Sprinkle this topping evenly over the soaked bread.
  5. Bake for 45–55 minutes, or until the top is golden-brown. For a softer casserole, bake for 45 minutes.
  6. Serve warm. Store any leftovers tightly covered in the refrigerator for 2–3 days.

Notes

This casserole is a cherished dish that brings back warm memories of family gatherings. It nourishes both body and soul, making it a perfect addition to your brunch traditions.

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