Overnight Blueberry French Toast Casserole
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This Overnight Blueberry French Toast Casserole is a showstopping breakfast or brunch that combines soft, buttery challah bread with a rich, creamy custard. The sweetness of fresh blueberries and a hint of citrus soak into the bread, creating a moist and tender texture baked to golden brown perfection. Don’t forget the warm homemade blueberry sauce drizzled over the top for an extra layer of flavor!
You’ll also love my Freezer Breakfast Sandwiches and Egg and Potato Casserole.
Quick Look at This Recipe
- Prep Time: 15 minutes
- Cook Time: 60 minutes
- Total Time: 1 hour 15 minutes
- Servings: 12 people
- Dietary Info: Can be made Dairy Free, Nut Free
- Method: Oven-Baked
- Technique: Layer challah bread cubes with a custard of eggs, milk, and cream, fold in blueberries, let soak overnight, then bake until golden and serve with blueberry sauce.
- Flavor & Texture: Sweet, creamy, and custardy with tender challah bread and a golden, slightly crisp top, finished with warm blueberry sauce.
Why You’ll Love This Family Favorite!
This overnight blueberry French toast casserole is one of those recipes I make when I want a breakfast that feels special without being complicated. It’s the perfect make-ahead recipe for Easter, Christmas morning, Mother’s Day brunch, or any celebration where you want to impress with minimal effort. The combination of custardy challah bread and juicy blueberries creates a breakfast that everyone will rush to the table for.
- Moist and Tender Bread: The bread cubes, soaked overnight in the egg mixture, absorb the liquid, resulting in a moist and tender texture similar to bread pudding.
- Creamy Layers: The cream cheese mixture or mascarpone forms creamy layers between the bread, creating pockets of richness that contrast with the softness of the soaked bread.
- Crispy Top: The casserole develops a yummiest golden-brown, slightly crispy top during baking, contrasting the softer interior.
- Juicy Burst from Blueberries: The blueberries, whether fresh or frozen, add juicy bursts of sweetness and a subtle tartness, creating pockets of flavor throughout the casserole.
If you want even more breakfast inspiration that won’t disappoint, check out my Best Loaded Vegetarian Quiche Recipe and Easy Breakfast Casserole Recipe with Potato and Egg next.
Made With Amore,
“I made this recipe for Mother’s Day brunch for our family. It was delicious! It was super quick and easy to make which is a plus when you don’t have a lot of time! My family loved this so much! Let’s just say there were no leftovers!”
– Nichole Loftus
Table of Contents
Ingredients for Blueberry French Toast Casserole
These key ingredients make this overnight breakfast casserole so flavorful and irresistible.
- Bread (Challah bread, Brioche bread, Sourdough bread, or French bread): Choose your preferred bread for the base. Challah adds a sweet and eggy flavor, brioche brings richness, sourdough adds a tangy twist, and French bread provides a classic touch. Great with most leftover bread or stale bread!
- Cream Cheese or Mascarpone: Adds a creamy and indulgent texture to the casserole. Cream cheese is tangy, while mascarpone contributes a smoother, milder flavor.
- Blueberries (Fresh or Frozen): A key ingredient, juicy blueberries add bursts of sweetness and vibrant color to the dish. They complement the creaminess of the cheese and the richness of the bread.
- Fresh Eggs: Bind the casserole, providing structure and a custard-like consistency. Eggs contribute to the overall richness of the dish.
- Blueberry Sauce (Optional): A sweet and tangy topping that enhances the flavor of the casserole; for the full recipe and step-by-step instructions, see my Homemade Blueberry Sauce recipe.
See recipe card for full information on ingredients and quantities.
Variations & Substitutions
- Bread: Substitute Challah with brioche, sourdough, French bread, or any other sturdy, day-old bread you have on hand.
- Cream Cheese or Mascarpone: Replace cream cheese with softened ricotta or cottage cheese for a different texture.
- Blueberries: Experiment with other berries such as raspberries, blackberries, or a mixed berry blend. If you love berries, you will love my Strawberry Crumble for dessert!
- Milk: Substitute regular milk with almond milk, soy milk, coconut milk, or any non-dairy alternative for lactose-free or vegan preferences.
How to Make Overnight Blueberry French Toast Casserole
The overnight soak lets you do most of the work the night before, making it perfect for a stress-free breakfast or brunch. Follow the step-by step photos and see the recipe card at the bottom for a printable version
- Make the custard with eggs and lemon zest for flavor.
- Add milk or heavy cream to create a rich custard base.
- Layer the bread, blueberries, and cream cheese into the baking dish.
- Pour the custard on top and let it rest overnight. The next morning bake in the oven.
- To make the optional blueberry sauce, heat water and cornstarch in a pot. This helps thicken the sauce.
- Add the blueberries and cook until they burst. Add the butter at the very end.
Recipe FAQs
While overnight refrigeration is an important step for optimal flavor and texture, you can let it sit for at least 4-6 hours before baking.
Yes, both fresh and frozen blueberries work well in this recipe. If using frozen blueberries, there’s no need to thaw them before incorporating them into the casserole.
If the bread isn’t stale, it will absorb all the liquid too fast. This results in a very long cooking time and a mushy interior. Here’s a shortcut for making “stale” bread: Spread the bread cubes on a lined baking sheet and toast in a 300°F (149°C) oven for about 10 minutes. Let it cool, and proceed with the recipe!
Store leftover breakfast casserole in an airtight container in the refrigerator for up to 2-3 days.
Serving Suggestions
I love serving this overnight blueberry French toast casserole as a showstopping breakfast or brunch dish alongside Hashbrown Breakfast Casserole or Classic Spinach Quiche. If you’re looking for something lighter, try my Italian Fruit Salad Recipe (Macedonia di Frutta).
My Pro Tips
Expert Tips
- Stale Bread: Use slightly stale or day-old bread for better absorption of the custard, resulting in a creamier texture.
- Uniform Cubes: Cut the bread into uniform cubes to ensure even soaking and baking.
- Room Temperature Ingredients: Allow cream cheese and eggs to come to room temperature for smoother incorporation.
- Press Down on Bread: When pouring the egg mixture over the bread, press down a few times to help the bread soak up the liquid evenly.
- Overnight Refrigeration: Refrigerate the casserole for at least 4 hours or overnight to allow the bread to absorb flavors and maintain a moist texture.
More Breakfast Recipes
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Blueberry French Toast Casserole
Equipment
Ingredients
Blueberry French Toast Casserole
- 12 slices about 1 pound, or 1 loaf, day old* Challah bread (brioche, sourdough, or French bread also work) cut into 1 inch cubes
- 2 8-ounce packages of cream cheese, or mascarpone cheese
- 1 ½ cups fresh or frozen blueberries
- 12 large eggs
- 2 cups milk
- 2 teaspoons vanilla extract
- Zest of 1 lemon, optional
- ½ cup real maple syrup
Homemade Blueberry Sauce (optional)
- ¾ cup granulated white sugar
- 2 tablespoons cornstarch
- 1 cup water
- 1 tablespoon lemon juice
- 1 cup fresh blueberries
- 1 tablespoon butter
Instructions
Prepare the Night Before
- Spray a 9×13 inch baking dish with nonstick spray.
- Cut the bread into 1-inch pieces and place half in the prepared baking dish.
- Cut the cream cheese (or mascarpone) into cubes or scoop with a small cookie scoop, placing on top of the bread. Sprinkle the blueberries over the cream cheese and top with the remaining bread cubes.
- In a large bowl, whisk together the eggs, milk, vanilla extract, lemon zest (if using), and maple syrup until well combined.
- Pour the egg mixture evenly over the bread cubes.
- Cover the dish with plastic wrap, press down with your hands a few times to ensure the bread absorbs the liquid, and refrigerate for 6 hours, or overnight.
The Next Morning
- Preheat the oven to 350 degrees F. Remove the pan from the fridge 1/2 hour before baking.Remove the plastic wrap and cover the dish with foil.
- Bake for 30 minutes, then remove the foil and bake for an additional 25 to 30 minutes, or until the center is set and the top is golden brown. Once the casserole is done, let it cool for a few minutes before slicing into individual portions.
- Optional: Garnish with additional fresh blueberries and a dusting of powdered sugar. In a medium saucepan, whisk together the sugar and cornstarch. Add the water and bring to a boil over medium heat. Keep stirring and boil for about 3 minutes. Stir in the blueberries and reduce heat to low. Simmer for about 10 minutes or until the blueberries pop and the mixture thickens. Stir in the butter until melted, and the sauce is glossy.
Notes
- Stale Bread: Use slightly stale or day-old bread for better absorption of the custard, resulting in a creamier texture.
- Uniform Cubes: Cut the bread into uniform cubes to ensure even soaking and baking.
- Room Temperature Ingredients: Allow cream cheese and eggs to come to room temperature for smoother incorporation.
- Press Down on Bread: When pouring the egg mixture over the bread, press down a few times to help the bread soak up the liquid evenly.
- Overnight Refrigeration: Refrigerate the casserole for at least 4 hours or overnight to allow the bread to absorb flavors and maintain a moist texture.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
My family loves this recipe, and I love how I get to prep it the day before and get to have such a fancy breakfast in the morning – perfect for holidays when I want my family to eat something special, but I don’t want to miss on the family time.
I love this perspective! Yes, that’s why this make-ahead dish is perfect the busy holiday season!
Made this for a Christmas brunch and it was a hit! Served it with the blueberry sauce and warm maple syrup on the side.
Happy you loved it. It’s a great recipe to feed a crowd.
Wondering if I could cut recipe in half?
Thanks
Yes! That will still work great!
I made this recipe for Mother’s Day brunch for our family. It was delicious! It was super quick and easy to make which is a plus when you don’t have a lot of time! My family loved this so much! Let’s just say there were no leftovers! Thank you for the incredible recipe Elena!♥️
So happy to hear this! It is a special treat and we never have leftovers either 😉
This was delightful! I requested this for my Mother’s Day brunch and it was so good! I loved the tart flavors of the blueberries and lemon together. Such a fresh taste.
We did have to cook it an extra 20 minutes for it to set, but worth the wait! Thank you for the treat of a recipe 🙂
You are welcome! I am happy you loved it so much! Yes, the cooking time might vary just a bit depending on the bread used.
This is always a huge hit at any brunch gathering or weekend with the family. Enjoy@