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Best Overnight Blueberry French Toast – Sweet Breakfast Casserole Everyone Loves

Irresistible Overnight Blueberry French Toast Casserole

This Irresistible Overnight Blueberry French Toast Casserole is the ultimate make-ahead breakfast that feels both cozy and indulgent. Soft cubes of bread soak overnight in a rich custard, layered with creamy pockets of sweetened cream cheese and bursts of juicy blueberries. Baked until golden and slightly crisp on top, it delivers the perfect balance of creamy and fluffy in every bite. Ideal for holidays, brunch gatherings, or relaxed weekends, this easy casserole saves time in the morning while still impressing everyone at the table. Serve warm for a comforting, bakery-style breakfast everyone will love!
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Prep Time 20 minutes
Cook Time 1 hour 15 minutes
Course: Breakfast, Brunch, Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

Cream Cheese Layer:
  • 8 oz cream cheese softened
  • 1 cup powdered sugar
  • 2 tablespoons milk
  • 1 tablespoon vanilla extract divided
  • 1 cup blueberries
Bread Base:
  • 2 loaves French bread cut into cubes (slightly stale works best)
Custard Mixture:
  • 2 cups milk
  • 8 large eggs
  • 1 teaspoon cinnamon
  • 1/2 teaspoon nutmeg
  • 1 cup blueberries

Method
 

    1. Make the Creamy FillingIn a mixing bowl, blend the softened cream cheese, powdered sugar, milk, and half of the vanilla extract until smooth and fluffy. Gently fold in the blueberries so they’re evenly distributed.
    2. Build the LayersSpread half of the bread cubes evenly into a greased baking dish to form the base. Spoon the cream cheese mixture over the top and smooth it out. Add the remaining bread cubes on top to create a second layer.
    3. Mix the CustardIn a separate bowl, whisk together the eggs, milk, remaining vanilla, cinnamon, and nutmeg until fully combined.
    4. Soak the BreadPour the custard mixture evenly over the layered bread, making sure all pieces are coated. Scatter the remaining blueberries across the top.
    5. Chill OvernightCover the dish tightly and refrigerate for at least 8 hours, or overnight. Before baking, let it sit at room temperature for about 30–60 minutes.
    6. BakePreheat your oven to 375°F (190°C). Bake covered for 45 minutes, then uncover and continue baking for another 25–30 minutes until the center is set and the top turns golden.
    7. ServeAllow the casserole to cool slightly before slicing. Serve warm and enjoy that creamy, berry-packed goodness.

Notes

Helpful Tips & Swaps

  • Berry swap: Frozen blueberries work great—no need to thaw. You can also try raspberries or blackberries.
  • Cheese options: Mascarpone or ricotta can replace cream cheese for a slightly different texture.
  • Bread choices: Brioche or challah adds extra richness, but any slightly dry bread will do the job.
  • Flavor boost: Add a pinch of ginger or cardamom for a unique twist on classic French toast flavor.