Can I use different fruit in my overnight French toast casserole?

Yes, you can definitely substitute other fruits! Berries like raspberries, strawberries, or blackberries work well. You can also use sliced peaches, apples, or pears. Just be mindful of the moisture content; if using a very juicy fruit, you might need to reduce the amount of milk slightly.

How long can overnight French toast casserole sit out before baking?

Ideally, your overnight French toast casserole should sit in the refrigerator. However, if it sits at room temperature, don't let it sit for more than 2 hours to avoid bacterial growth.

Can I make this casserole gluten-free?

Absolutely! Simply use gluten-free bread. Many gluten-free bread options are available, and they work just as well in the casserole. Double-check all other ingredients to ensure they are also gluten-free.

How do I prevent my French toast casserole from being soggy?

To avoid a soggy casserole, use slightly stale or day-old bread. This allows the bread to soak up the custard without becoming mushy. Also, don't over-saturate the bread with the egg mixture. Ensure the casserole is baked thoroughly until the center is set.

Can I freeze overnight French toast casserole?

Yes, you can freeze it either before or after baking. If freezing before baking, wrap it tightly in plastic wrap and then aluminum foil. Thaw overnight in the refrigerator before baking. If freezing after baking, let it cool completely, then wrap and freeze. Reheat in the oven until warmed through.

What's the best type of bread to use for French toast casserole?

Challah, brioche, or French bread are excellent choices because they are sturdy and absorb the custard well. Avoid using very soft or thin bread, as it may become too soggy.

Overnight French Toast Breakfast Casserole with Blueberries: Your Dream Morning, Made Easy 2026

Overnight French Toast Breakfast Casserole with Blueberries

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This make-ahead breakfast casserole transforms simple ingredients into a special morning meal. Prepped the night before, it bakes up golden and fragrant with a creamy interior and a crisp streusel topping. It’s the perfect centerpiece for a stress-free brunch.

Author: Harmony
Prep Time: 20min
Cook Time: 55min
Total Time: 9h 15min
Yield: 12 servings 1x
Category: breakfast
Method: baking
Cuisine: American

Ingredients

Scale

1 large loaf (16 oz) challah, brioche, or French bread, cut into 1-inch cubes
2 cups fresh or frozen blueberries
8 large eggs
2 cups whole milk or half-and-half
1/2 cup granulated sugar
1 tablespoon pure vanilla extract
2 teaspoons ground cinnamon
1/2 teaspoon ground nutmeg
1/4 teaspoon salt
1/2 cup all-purpose flour
1/2 cup packed light brown sugar
1/2 teaspoon cinnamon
1/4 teaspoon salt
1/2 cup (1 stick) cold unsalted butter, cubed

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Instructions

Grease a 9×13 inch baking dish with butter or non-stick spray.
Spread half of the bread cubes in the dish. Scatter blueberries evenly over the bread, then top with remaining bread cubes.
In a large bowl, whisk eggs until frothy. Whisk in milk, granulated sugar, vanilla, 2 tsp cinnamon, nutmeg, and 1/4 tsp salt until smooth.
Pour custard evenly over bread and berries. Gently press down on bread to ensure all pieces are submerged.
Cover dish tightly with plastic wrap and refrigerate for at least 8 hours or up to 12.
When ready to bake, preheat oven to 350°F (175°C).
For streusel: In a medium bowl, combine flour, brown sugar, 1/2 tsp cinnamon, and 1/4 tsp salt. Cut in cold butter until mixture resembles coarse crumbs.
Remove casserole from fridge and uncover. Sprinkle streusel topping evenly over the surface.
Bake for 50-60 minutes, until top is golden brown and center is set. A knife inserted should come out clean.
Let casserole stand for 10 minutes before serving.

Notes

Use stale or lightly toasted bread for best texture. Do not skip the overnight chill. For a dairy-free version, use full-fat coconut milk and plant-based butter. Frozen blueberries do not need to be thawed.

Nutrition

Serving Size: 12
Calories: 320
Sugar: 24
Sodium: 280
Fat: 13
Saturated Fat: 7
Unsaturated Fat: 5
Trans Fat: 0
Carbohydrates: 42
Fiber: 2
Protein: 9
Cholesterol: 155

Find it online: https://www.homestyletable.com/overnight-french-toast-breakfast-casserole-blueberries/