Name: Overnight Blueberry French Toast Casserole
Prep time: 15 min
Cook time: 50 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 loaf brioche or French bread, cubed; 6 large eggs; 1 1/2 cups milk; 1/2 cup heavy cream; 1/2 cup granulated sugar; 1 tsp vanilla extract; 1/2 tsp ground cinnamon; 1 1/2 cups fresh blueberries; Powdered sugar, for dusting; Maple syrup, for serving

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Overnight Blueberry French Toast Casserole brings back memories of a special brunch I hosted for friends one cozy Sunday morning. I wanted something hearty and sweet but also something I could prep the night before so I wouldn’t be stuck in the kitchen while everyone chatted over coffee. That’s when this recipe came to life and quickly became one of my most requested dishes for gatherings.

Every bite is full of custardy bread and bursts of warm blueberries and I love how the top gets perfectly golden while the bottom stays creamy and infused with cinnamon and vanilla and it’s the kind of breakfast that feels comforting and celebratory all at once and it makes slow mornings so much more delicious.

Ingredients

Here’s what I use for this recipe. You can always make substitutions if you prefer!
Brioche or French bread – Absorbs the custard beautifully without getting soggy
Eggs – Bind the ingredients and create a rich custard base
Milk – Makes the casserole soft and creamy
Heavy cream – Adds extra richness to the custard
Granulated sugar – Sweetens the base just right
Vanilla extract – Infuses warmth and depth into the mixture
Ground cinnamon – Adds a cozy spiced flavor
Fresh blueberries – Provide juicy bursts of flavor throughout
Powdered sugar – For dusting on top
Maple syrup – Optional for serving, adds that final touch of sweetness

Tools You’ll Need

9×13-inch baking dish – Ideal size for layering the bread and custard
Mixing bowls – For preparing the egg and milk mixture
Whisk – Helps evenly mix the custard base
Measuring cups and spoons – For accurate ingredient amounts
Plastic wrap – To cover and refrigerate the casserole overnight
Oven – Bakes the dish to golden, bubbly perfection
Spatula – For serving neat slices

Instructions

Step 1:

I begin by greasing my baking dish and cutting the brioche into 1-inch cubes. Then I spread the bread evenly in the dish and sprinkle the blueberries over the top.

Step 2:

In a large bowl, I whisk together the eggs, milk, cream, sugar, vanilla, and cinnamon until smooth and fully combined.

Step 3:

I pour the custard mixture evenly over the bread and blueberries, gently pressing down so the bread absorbs the liquid.

Step 4:

I cover the dish with plastic wrap and refrigerate it overnight to let the flavors soak in and the texture set.

Step 5:

The next morning, I take it out of the fridge while the oven preheats to 350°F.

Step 6:

I bake the casserole uncovered for 45–50 minutes until the top is golden and the center is set but slightly soft.

Step 7:

After baking, I let it cool for a few minutes before dusting with powdered sugar and drizzling with warm maple syrup if desired.

Tips

If I want extra crispiness, I broil the top for a minute or two at the end. For a fun twist, I sometimes add a handful of white chocolate chips or switch up the fruit with raspberries or chopped peaches. I’ve even tried it with cinnamon raisin bread—and it was a hit!

Ways to Serve

This casserole is perfect for holiday brunches, weekend guests, or meal-prepping a cozy breakfast for the week. I love serving it with crispy bacon, a dollop of Greek yogurt, or just a cup of hot coffee. It’s also delicious cold the next day!

Frequently Asked Questions

Can I freeze Overnight Blueberry French Toast Casserole?

Yes, bake it first, then cool completely and freeze in portions. Reheat in the oven or microwave.

Can I make Overnight Blueberry French Toast Casserole dairy-free?

Absolutely, use almond milk and coconut cream, and a dairy-free bread.

What’s the best bread for Overnight Blueberry French Toast Casserole?

Brioche, challah, or sturdy French bread all work well because they soak up the custard without getting mushy.

See You in the Kitchen

I hope you give this Overnight Blueberry French Toast Casserole a try! It’s one of my favorites, and I’d love to hear how yours turns out. Feel free to leave a comment below or share your results with me! And if you loved this recipe, don’t forget to pin it to your favorite breakfast board.

Happy Cooking!