Unbelievable Blueberry French Toast Casserole

Name: Unbelievable Blueberry French Toast Casserole
Prep time: 25 min
Cook time: 50 min
Total time: 1 h 15 min
Cuisine: American
Ingredients: 1 (12–14-ounce/340–400g) loaf of sturdy day-old bread, such as French bread, sourdough, brioche, or challah, cut in 1-inch cubes*; 1 cup (140g) fresh or frozen blueberries; 2 cups (480g/ml) whole milk; 8 large eggs; 1/2 cup (120g/ml) heavy cream; 1/2 cup (100g) packed light brown sugar; 2 teaspoons pure vanilla extract; 2 teaspoons ground cinnamon; 1 teaspoon fresh lemon zest; pinch of salt; 1/3 cup (67g) packed light or dark brown sugar; 1/3 cup (42g) all-purpose flour (spooned & leveled); 1/2 teaspoon ground cinnamon; 6 Tablespoons (85g) unsalted butter, cold and cubed; optional: extra blueberries, maple syrup, and/or confectioners’ sugar for topping

Instructions

Prep:25minCook:50min

This unbelievable blueberry French toast casserole is made with soft custard-soaked bread, sweet blueberries, and a buttery brown sugar streusel topping. The casserole benefits from sitting in the refrigerator overnight before baking, so this is an excellent make-ahead breakfast recipe! This recipe is also in my cookbook, Sally's Baking 101.

Updated at: Mon, 27 Apr 2026 08:38:25 GMT