Best Blueberry French Toast Casserole

Name: Best Blueberry French Toast Casserole
Prep time: 15 min
Cook time: 45 min
Total time: 70 min
Ingredients: 1 loaf French bread (cut into 1-inch cubes); 2 cups fresh or frozen blueberries; 8 large eggs; 2 cups whole milk; ½ cup heavy cream; ½ cup granulated sugar; 1 tsp vanilla extract; 1 tsp ground cinnamon; Butter or non-stick spray for greasing; Maple syrup or powdered sugar (optional topping)

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By: Maria
Posted: 04/23/2025

Looking for the Best Blueberry French Toast Casserole that’s bursting with juicy berries, creamy custard, and the perfect golden-baked top? This crowd-pleasing breakfast casserole is ideal for holidays, brunch parties, or lazy weekend mornings. Prep it the night before or make it fresh—it’s simple, indulgent, and absolutely unforgettable!

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🫐 Ingredients for the Best Blueberry French Toast Casserole

1 loaf day-old French Bread, cubed (about 10 cups)
1 1/2 cups fresh or frozen blueberries
8 large eggs
2 cups whole milk
1/2 cup heavy cream
1/3 cup granulated sugar
1/3 cup brown sugar
2 teaspoons vanilla extract
1 teaspoon ground cinnamon
1/4 teaspoon nutmeg
Pinch of salt
2 tablespoons butter, for greasing the dish

For the Crumb Topping:

1/2 cup all-purpose flour
1/4 cup brown sugar
1/2 teaspoon cinnamon
1/4 cup cold butter, cut into cubes

🥄 Substitutions for Blueberry French Toast Casserole

Bread: Use brioche, challah, or sourdough for different textures.
Milk: Substitute with almond milk or oat milk for a dairy-free version.
Heavy cream: Use half-and-half or more milk if you’re lightening it up.
Blueberries: Swap with raspberries, blackberries, or chopped strawberries.
Sugar: Coconut sugar or maple syrup can replace brown sugar in a pinch.

🍽️ How to Make the Best Blueberry French Toast Casserole

Grease a 9×13-inch baking dish with butter. Add half of the cubed bread.
Sprinkle blueberries evenly over the bread layer. Add the remaining bread cubes on top.
In a large bowl, whisk together eggs, milk, cream, sugars, vanilla, cinnamon, nutmeg, and salt until well combined.
Pour the custard mixture evenly over the bread and blueberries. Lightly press down to soak all the bread.
In a small bowl, combine the crumb topping ingredients until the texture is coarse and crumbly. Sprinkle over the casserole.
Cover and refrigerate overnight (optional) or bake immediately.
Bake at 350°F (175°C) for 45–50 minutes until golden and set in the center.
Let it cool slightly and serve warm with maple syrup or whipped cream.

🍓 Delicious Mix-ins for Blueberry French Toast Casserole

Cream cheese cubes for a tangy twist.
Lemon zest for added brightness.
Chopped nuts like pecans or almonds for crunch.
Chocolate chips for a sweet upgrade.
A splash of maple syrup in the custard for deeper flavor.

🔥 Recipe Tips for Success

Use day-old bread so it absorbs the custard without getting soggy.
If baking right away, let the casserole rest for 20 minutes before baking.
Bake covered with foil for the first 30 minutes, then uncover to finish for a crisp top.
Let it rest 10 minutes before serving for easier slicing.

🧊 Storage Instructions

Refrigerate leftovers in an airtight container for up to 4 days.
To reheat, warm in the oven at 325°F or microwave in short bursts.
Can be frozen for up to 2 months. Thaw overnight and reheat before serving.

🔄 Recipe Variations

Make it savory by omitting sugar and fruit, and adding sautéed veggies, cheese, and cooked sausage.
Use apples and cinnamon for a fall twist.
Try a streusel topping with oats and cinnamon for extra crunch.
Add a splash of bourbon or rum for a holiday vibe.

❓ FAQs About the Best Blueberry French Toast Casserole

Can I make this casserole ahead of time?

Yes! This recipe is perfect for overnight prep. Just assemble, refrigerate, and bake the next morning.

Do I have to use French bread?

Nope! Brioche, challah, or sourdough work wonderfully too.

Can I use frozen blueberries?

Absolutely. No need to thaw—just toss them in frozen.

How do I know when it’s fully baked?

The casserole should be puffed and golden, and a knife inserted in the center should come out clean.

Frequently Asked Questions

Can I make this casserole ahead of time?

Yes! This Blueberry French Toast Casserole is ideal for make-ahead preparation. Assemble the casserole completely, cover it tightly with plastic wrap or foil, and refrigerate overnight (or up to 24 hours) before baking. This allows the bread to fully absorb the custard, resulting in a more flavorful and evenly cooked dish. If you are making it ahead, it’s best to bake it directly from the refrigerator.

What are some good substitutions for the French bread?

While French bread is the classic choice, you can easily substitute it with other types of bread. Brioche, challah, or even sourdough work exceptionally well, offering different textures and flavor profiles. For a richer flavor, use brioche. Challah will give a slightly sweeter taste. Sourdough will provide a tangy element. The key is to use a day-old bread or let it sit out to dry slightly so it can soak up the custard.

How can I tell when the Blueberry French Toast Casserole is perfectly cooked?

The casserole is done when it’s puffed up, golden brown on top, and the custard has set. The center should no longer be jiggly. You can insert a knife or toothpick into the center; it should come out clean or with just a few moist crumbs. The internal temperature should be around 200-205°F (93-96°C) in the center. Also, the edges should be set and slightly pulling away from the sides of the baking dish.

Can I double or scale up this recipe for a larger crowd?

Yes, you can easily double this recipe. Use a larger baking dish, such as a 9×13 inch or larger pan. Make sure to adjust the ingredient quantities proportionally, doubling all ingredients. You might need to increase the baking time by 10-15 minutes, so keep an eye on it. The cooking time may vary slightly depending on your oven.

What are the nutritional highlights of this Blueberry French Toast Casserole?

This casserole provides a good source of carbohydrates from the bread, and protein from the eggs and milk. Blueberries are packed with antioxidants and fiber, which are beneficial for heart health. The milk contributes calcium and vitamin D. Adding nuts will increase the healthy fats and fiber. Remember that the nutritional content will vary based on the bread and other ingredients used.

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Blueberry Oatmeal Breakfast Bars [50 Minutes]

Best Blueberry French Toast Casserole

This Best Blueberry French Toast Casserole is a rich, comforting breakfast dish made with sweet blueberries, fluffy bread, and a luscious custard. It’s easy to prep ahead and perfect for a weekend brunch or holiday breakfast.

Prep : 10 Total : 25 minutes

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Ingredients

1 loaf French bread cut into 1-inch cubes
2 cups fresh or frozen blueberries
8 large eggs
2 cups whole milk
½ cup heavy cream
½ cup granulated sugar
1 tsp vanilla extract
1 tsp ground cinnamon
Butter or non-stick spray for greasing
Maple syrup or powdered sugar optional topping

Instructions

Grease a 9x13-inch baking dish.
Cut the bread into cubes and place half in the dish.
Sprinkle with half the blueberries.
Add the remaining bread and top with the rest of the blueberries.
In a bowl, whisk together eggs, milk, cream, sugar, vanilla, and cinnamon.
Pour the custard mixture evenly over the bread.
Cover and refrigerate for at least 2 hours or overnight.
Preheat oven to 350°F (175°C).
Bake uncovered for 45 minutes or until golden brown.
Let rest 10 minutes before serving. Optional: top with maple syrup or powdered sugar.

Notes

For best results, let the casserole soak overnight. You can swap blueberries with raspberries or chopped strawberries. Great to make ahead for holidays or large family breakfasts.