Overnight Blueberry French Toast Bake

This Overnight Blueberry French Toast Bake is the kind of breakfast that feels special but asks very little of you in the morning. The custard soaks into the bread overnight, so all you do is scatter a few more blueberries on top and bake it.

In under an hour, you get a puffed golden casserole with jammy pockets of fruit and a soft, creamy center. It is the sort of dish that makes a regular Saturday feel like a holiday.

Why This One Works

The challah soaks up every bit of the custard overnight, turning soft inside while the top bakes up crackly and deep amber. You never get dry spots because the bread absorbs all the liquid evenly.

The blueberries burst as the casserole bakes, creating little pockets of warm, jammy fruit that cut through the richness of the custard. It tastes like a blueberry muffin met a bread pudding, and the oven does most of the work.

Ingredients

• 1 loaf (about 1 lb) challah or brioche: slightly stale works best, no need to remove the crust
• 2 cups fresh or frozen blueberries, divided: no need to thaw frozen berries
• 8 large eggs
• 2 cups whole milk
• 1/2 cup heavy cream
• 1/3 cup plus 1 tbsp granulated sugar, divided: the extra tablespoon goes on top before baking
• 1 tsp vanilla extract
• 1/2 tsp ground cinnamon
• 1/4 tsp fine sea salt
• Butter, for greasing the dish
• Powdered sugar, for dusting

Variations / Substitutions

• Bread: a sturdy white sandwich loaf or French bread works if challah is not available, just tear it into pieces and use the same volume
• Berries: swap the blueberries for raspberries, blackberries, or diced strawberries, frozen or fresh all hold up well
• Dairy-free: use oat milk and full-fat canned coconut milk in place of the milk and cream, the texture will be a little lighter but still creamy
• Spice: add a pinch of nutmeg or cardamom to the custard for a different warm note

For another make-ahead breakfast, try my Stuffed French Toast with Cream Cheese.

How to Make Overnight Blueberry French Toast Bake

Step 1: Layer the Bread and Blueberries

Butter a 9×13-inch baking dish. Tear the challah into rough 1-inch pieces, you will have about 8 cups total. Spread half the bread evenly in the dish, then scatter 1 cup of the blueberries over it. Top with the remaining bread, tucking a few more blueberries into the layers as you go.

The torn edges catch more custard than neat cubes, so do not worry about getting even pieces. Slightly irregular chunks give you a better mix of soft centers and crispy peaks.

Step 2: Whisk the Custard

In a large bowl, whisk the 8 eggs, 2 cups milk, 1/2 cup heavy cream, 1/3 cup sugar, 1 tsp vanilla, 1/2 tsp cinnamon, and 1/4 tsp salt until smooth, about 1 minute.

The custard will look pale yellow and a little frothy on top. That thin froth disappears as it bakes and helps the top brown evenly.

Step 3: Pour Over the Custard and Chill

Slowly pour the custard over the bread, aiming for dry spots so every piece gets soaked. Use a spatula or the back of a spoon to gently press the bread down into the liquid. Cover the dish tightly with plastic wrap and refrigerate for at least 8 hours or overnight.

In the morning, the bread will have absorbed almost all the liquid and the dish will feel heavy and dense. That deep soak is what gives you the creamy interior later.

Step 4: Bake the French Toast

Preheat the oven to 350°F (175°C). Remove the dish from the fridge and uncover it. Scatter the remaining 1 cup blueberries on top and sprinkle the reserved 1 tbsp sugar over everything. Bake for 45 to 50 minutes, until the center is set and no longer jiggles when you nudge the dish, and the top is deeply golden.

The sugar on top will melt and help the surface caramelize into a thin, crackly crust. If the top browns too quickly during the last 10 minutes, tent it loosely with foil.

Step 5: Dust with Sugar and Serve

Let the casserole cool on a wire rack for 5 minutes so the custard finishes setting. Dust generously with powdered sugar right before you bring it to the table, then spoon big servings onto plates while it is still warm.

The powdered sugar melts into the hot berry pockets and makes every bite look like the morning version of a snow-dusted pastry.

A Few Notes Before You Start

• If your bread is very fresh, the torn pieces can turn gummy during the overnight soak. Spread the pieces on a sheet pan and dry them in a 300°F oven for 10 minutes first, then let them cool before you build the casserole.
• For an extra creamy twist, tuck small cubes of cold cream cheese into the layers before you pour the custard. It softens into little pockets of richness as the casserole bakes.
• This recipe doubles easily. Use a deep 9×13-inch dish or a larger casserole, increase the custard ingredients by half for a slightly thicker layer, and add 10 minutes to the bake time.

Bake times by dish size:

Storing Leftovers

• Refrigerate: cover the cooled leftover casserole tightly and store in the fridge for up to 3 days. The texture stays soft because the custard keeps it moist.
• Reheating: warm individual portions in the microwave for 45 to 60 seconds, or reheat the whole dish covered in a 300°F oven for about 15 minutes until warmed through.

What To Serve With Blueberry French Toast Bake

A dollop of thick Greek yogurt or sour cream on the side adds a tang that cuts right through the custard’s richness. Crisp bacon or breakfast sausage gives you a salty contrast to the sweet berries. If you want to keep it all on the lighter side, a simple bowl of fresh berries with a squeeze of lemon works beautifully.

Frequently Asked Questions

Can I use frozen blueberries without thawing them?

Yes. Toss them in frozen, do not thaw first. They will bleed some juice but that turns into little syrupy pockets and actually tastes great.

Can I skip the overnight soak?

You can, but let the casserole sit at room temperature for at least 1 hour before baking so the bread can absorb enough custard. The texture will be slightly less creamy but still good.

How do I make this dairy-free?

Swap the whole milk for unsweetened oat milk and the heavy cream for full-fat canned coconut milk. The result is a little lighter but still rich.

Can I add a streusel topping?

Absolutely. Mix 1/3 cup flour, 1/3 cup brown sugar, and 3 tbsp cold butter with your fingers until crumbly. Sprinkle it on right before baking for a crisp, buttery top.

Blueberry French Toast Bake Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Calories: 360

Ingredients Method Notes

Ingredients

  

• 1 loaf (about 1 lb) challah or brioche
• 2 cups fresh or frozen blueberries, divided
• 8 large eggs
• 2 cups whole milk
• 1/2 cup heavy cream
• 1/3 cup plus 1 tbsp granulated sugar, divided
• 1 tsp vanilla extract
• 1/2 tsp ground cinnamon
• 1/4 tsp fine sea salt
• Butter, for greasing the dish
• Powdered sugar, for dusting

Method

 

1. Butter a 9×13-inch dish. Tear bread into rough 1-inch pieces (about 8 cups). Layer half the bread in the dish, scatter 1 cup blueberries over it, and top with the remaining bread.
2. Whisk eggs, milk, heavy cream, 1/3 cup sugar, vanilla, cinnamon, and salt until smooth.
3. Pour custard evenly over the bread and press down gently. Cover and refrigerate at least 8 hours or overnight.
4. Preheat oven to 350°F (175°C). Uncover the dish, scatter the remaining 1 cup blueberries and 1 tbsp sugar on top, and bake 45 to 50 minutes until set and golden.
5. Let cool 5 minutes, dust with powdered sugar, and serve warm.

Notes

This casserole needs to soak overnight (at least 8 hours), which is not counted in the prep time. You can use any sturdy white bread if challah is not available; just tear it and use the same volume. Bake time may vary a few minutes depending on your dish material and oven, so check for a set center that no longer jiggles.