Delicious Brioche French Toast Casserole: The Ultimate Make-Ahead Breakfast
Imagine waking up to the comforting aroma of a freshly baked breakfast, without having to rush around in the morning. This dream becomes a reality with our incredibly simple recipe for Brioche French Toast Casserole. This delightful dish transforms ordinary breakfast into a special occasion, perfect for holidays, weekend brunches, or any day you want to treat your loved ones.
Buttery, rich brioche bread is lovingly soaked in a decadent custard mixture, then baked to a beautiful golden brown. Each serving is irresistibly fluffy on the inside with a hint of crispness on the outside, ready to be drizzled generously with maple syrup and your favorite toppings. This isn’t just a recipe; it’s an invitation to savor precious moments with family and friends.

This casserole is truly the easiest way to make French toast for a crowd. Forget the endless dipping of individual bread slices, the messy stovetop, and the stress of serving everyone at once. With this baked method, all the prep work can be done ahead of time, allowing you to relax and enjoy your morning. It’s a game-changer for entertaining!
Why You’ll Fall in Love with This French Toast Bake
My favorite way to celebrate special days is by creating a memorable breakfast for my family. The scents of freshly brewed coffee, sweet maple syrup, and fluffy French toast wafting through the house are guaranteed to put anyone in a joyful mood. Taking that extra bit of time in the morning to prepare such a treat is a delicious way to show your guests or loved ones just how much you care. This make-ahead recipe for baked brioche French toast casserole is one of my go-to methods for spreading that joy.
Here’s why this recipe will quickly become a cherished favorite in your kitchen:
- Effortless Entertaining: This is, without a doubt, the most convenient way to serve French toast to a large group. No more standing over a hot stove flipping individual slices. Simply assemble everything the night before and pop it into the oven in the morning. Imagine the luxury of enjoying your coffee while breakfast bakes to perfection!
- Perfect for Any Celebration: Whether it’s Mother’s Day brunch, a festive Christmas morning, a cozy Thanksgiving breakfast, Easter Sunday, or just a lazy weekend gathering, this casserole adds a touch of elegance and comfort to any occasion. Its impressive presentation belies its simple preparation.
- A Thoughtful Gift: This easy French toast bake is also an excellent choice for bringing to new parents, friends recovering from illness, or anyone who could use a comforting, homemade meal. It’s a gesture that speaks volumes, providing warmth and delicious nourishment.
- Simple, Wholesome Ingredients: You’ll love that this recipe uses basic ingredients you likely already have in your pantry and fridge. Furthermore, the fruit component is incredibly versatile. While blueberries pair wonderfully, you can easily swap them out for whatever fresh or frozen berries or fruits you have on hand, adapting the recipe to your taste and seasonal availability.
- Customizable to Your Liking: From different types of bread to various mix-ins and toppings, this casserole is a blank canvas for your culinary creativity. It’s a forgiving recipe that encourages experimentation.
Note: If you’re short on time and want to make and bake on the same day, you absolutely can! Just ensure the bread has a quick, thorough soak (at least 1 hour) before baking for the best texture.
Essential Ingredients for Your Brioche French Toast Casserole
Creating an exceptional French toast casserole starts with selecting quality ingredients. Each component plays a vital role in achieving that perfect balance of rich flavor and satisfying texture. Here’s what you’ll need:

- Cubed Bread (preferably Brioche): You’ll need about one standard loaf of buttery Brioche bread, cut into 1 ½-inch cubes. Brioche is highly recommended due to its rich, soft, and slightly sweet nature, which makes for an incredibly tender and flavorful casserole. However, don’t limit yourself – other bakery-style loaves like French bread, challah, or even sturdy sourdough can also yield delicious results.
- The Secret to Success: Dry or Stale Bread. This is crucial! Bread that is slightly dry or stale works best because it acts like a sponge, soaking up the custard mixture without becoming soggy. Plan ahead by purchasing a day-old loaf, or leave fresh bread out on the counter overnight.
- Quick Drying Method: If your bread is fresh and you’re making the casserole on the same day, you can quickly dry it out in the oven.
- Spread the bread cubes evenly on a baking sheet.
- Bake at 275ºF (135ºC) for 5-10 minutes, or until the cubes feel crusty but aren’t browned.
- Remove from the oven and allow to cool briefly before using.
- Half and Half: This dairy staple strikes a perfect balance, providing a lovely creaminess to the custard without making it excessively heavy. If half and half isn’t readily available, you can easily create your own substitute by combining equal parts (half) whole milk and (half) heavy cream.
- Eggs: Eggs are the essential binding agent in any French toast recipe, creating the rich, custardy texture that defines this dish. They also contribute to the beautiful golden crust during baking.
- Blueberries (or Mix-ins of Choice): Fresh blueberries are a fantastic complement to the rich brioche, adding bursts of tangy sweetness and a touch of vibrant color. However, feel free to get creative! Strawberries, raspberries, sliced bananas, chocolate chips, chopped nuts (like pecans or walnuts), or even a combination of these can be wonderful additions. Tailor it to your personal preference!
- Flavor Enhancers: You’ll also need brown sugar for sweetness and depth, vanilla extract for warmth, ground cinnamon and nutmeg for classic French toast spice, and a touch of lemon juice to brighten the flavors and cut through the richness.
For Serving (Optional, but highly recommended!)
- Powdered sugar for a delicate finish
- Warm maple syrup for classic sweetness
- Fluffy whipped cream for an extra touch of indulgence
- Fresh berries or sliced fruit for garnish and a pop of freshness
For a precise list of ingredients and their exact quantities, please refer to the comprehensive recipe card below.
Step-by-Step Guide: How to Make French Toast Casserole
Whether you’re preparing a memorable breakfast for a special holiday gathering or simply seeking a fantastic recipe for weekend mornings, this French toast casserole is a dish the entire family will adore. Its simplicity and make-ahead convenience make it an absolute winner!
Preparing the Rich Custard Mixture


Step one: In a large mixing bowl, combine the eggs, half and half, lemon juice, vanilla extract, ground cinnamon, and nutmeg. These ingredients will form the flavorful base of your casserole.
Step two: Whisk all the ingredients together thoroughly until they are well combined and the eggs are completely beaten into the mixture. Ensure there are no streaks of egg white remaining, as this will lead to an unevenly cooked custard.
Layering the Bread and Berries
Proper layering ensures every bite of your casserole is infused with flavor and delightful texture.


Step three: Generously grease a 9×13-inch (23x33cm) baking dish. Then, place about half of your dried brioche bread cubes evenly across the bottom of the dish, creating a solid foundation for the casserole.
Step four: Evenly sprinkle 1 cup of your blueberries (or chosen mix-ins) over the first layer of bread cubes. Follow this with the remaining bread cubes, forming a second layer, and then scatter the rest of the blueberries on top. This ensures fruit and bread are distributed throughout the casserole.
Soaking and Baking for Perfection
The soaking process is key to a truly custardy French toast casserole, while proper baking yields a golden, delicious result.


Step five: Carefully pour the prepared custard mixture evenly over the bread cubes and blueberries in the casserole dish. Use a wooden spoon or a spatula to gently press down on the bread, ensuring all the cubes are fully submerged and have the chance to soak up the delicious liquid.
Step six: Cover the baking dish tightly with plastic wrap or aluminum foil. Place it in the refrigerator and allow the mixture to soak for at least 1 hour. For the absolute best results and a truly custardy interior, soaking it overnight is highly recommended. This extended soak time is what makes this casserole so special.
Tips for an Amazing Overnight French Toast Casserole
To prepare this incredible breakfast for a crowd with minimal morning effort, simply assemble the casserole as described, pouring in the egg and half-and-half mixture. Cover it tightly with plastic wrap or aluminum foil and place it in the refrigerator to soak and rest overnight. This extended period allows the brioche to fully absorb the flavors, leading to an incredibly tender and moist texture.
The next morning, you have two options for baking: either place the cold dish directly into a cold oven before turning it on to preheat, or let the dish come to room temperature on the counter for about 30-60 minutes before placing it into a preheated oven. The cold oven method is often preferred to prevent thermal shock to your baking dish.


Step seven: Once thoroughly soaked, remove the cover from the baking dish. Bake uncovered in a preheated 350ºF (177ºC) oven for 45-55 minutes. The casserole is ready when the egg mixture is fully cooked through (it shouldn’t jiggle in the center), and the top has achieved a beautiful, golden-brown hue. If the top begins to brown too quickly, you can loosely tent it with aluminum foil.
Step eight: Remove the casserole from the oven and let it rest for a few minutes. If desired, sprinkle generously with powdered sugar for an elegant finish. Slice into individual portions and serve warm with your choice of luscious whipped cream, rich maple syrup, or extra fresh berries. Enjoy!
Important Baking Tip: To prevent the possibility of thermal shock that could crack your baking dish, especially when transitioning from a cold refrigerator to a hot oven, I highly recommend placing your cold casserole dish directly into a cold oven. Then, set your oven to the required temperature and allow it to preheat. As the oven gradually warms up, it will gently bring the casserole dish to temperature, significantly reducing the likelihood of breakage. This method ensures both safety and optimal baking.

Perfect Pairings: What to Serve with Baked French Toast
The beauty of this baked French toast casserole is that it’s wonderfully satisfying on its own, offering a hearty and complete breakfast. However, it also serves as an excellent centerpiece for a larger brunch spread, pairing beautifully with a variety of side dishes. Consider these options to complement its sweet and custardy flavors:
- Savory Meats: Crispy bacon, savory breakfast sausages (pork or chicken), or even smoked ham slices provide a delightful contrast to the sweetness of the French toast.
- Egg Dishes: Fluffy scrambled eggs, a light egg custard, or a frittata can add another layer of protein and texture to your meal.
- Fresh Fruit Medley: A vibrant fruit salad or simply a platter of sliced fresh fruits like berries, melon, pears, and apples adds freshness, color, and vital nutrients.
- Potato Sides: A comforting hashbrown casserole or crispy home fries offer a delicious, starchy element to the brunch table.
- Refreshing Beverages: Smoothies, freshly squeezed orange juice, or celebratory mimosas are perfect accompaniments to complete your breakfast experience.
Storing and Reheating Your Casserole
Ensuring your delicious brioche French toast casserole can be enjoyed beyond the first serving is simple with these storage and reheating tips:
Storing Leftovers: Any leftover casserole should be transferred to an airtight container and stored in the refrigerator. It will keep well for up to 3 days, maintaining its wonderful flavor and texture.
Reheating Individual Servings: For quick and easy reheating, place individual slices in the microwave. Heat in 30-second intervals until warmed through to your desired temperature. Alternatively, you can reheat slices in a toaster oven for a slightly crispier exterior. Once warm, top with fresh maple syrup, a dollop of whipped cream, and/or a dusting of powdered sugar before serving.
Freezing for Future Enjoyment: This casserole is incredibly freezer-friendly! You can choose to freeze it either before baking or after it has been baked and thoroughly cooled. When you’re ready to enjoy it, simply thaw the casserole overnight in the refrigerator. If frozen before baking, follow the original baking instructions. If frozen after baking, reheat as desired in the oven (covered with foil to prevent drying) or microwave until heated through. Freezing makes this an ideal meal prep option for busy weeks or unexpected guests!

Choosing the Best Bread for French Toast Casserole
The foundation of an outstanding French toast casserole lies in the bread you choose. Its quality and condition directly impact the final texture and flavor of your dish. Here’s what you need to know:
- Brioche is Supreme: While there are alternatives, brioche bread truly shines in this recipe. Its high butter and egg content give it a naturally rich, soft, and slightly sweet flavor that perfectly complements the creamy custard. The tender crumb also soaks up the liquid beautifully, resulting in an unbelievably moist and decadent casserole.
- Excellent Alternatives: If brioche isn’t available, don’t despair! Other bakery-style loaves work wonderfully. French bread (baguette or bâtard), challah (a rich, braided egg bread), or even a robust sourdough can be fantastic substitutes. These breads offer a sturdy structure that holds up well to soaking without disintegrating. In a pinch, even plain old sandwich bread can be used, though the texture and richness will be different.
- The Critical Factor: Dry or Stale Bread. This cannot be overstated. Regardless of the type of bread, it *must* be somewhat dry or stale. Fresh, soft bread contains too much moisture and will turn mushy when soaked in the custard, leading to a soggy casserole. Stale bread, on the other hand, is perfectly primed to absorb the liquid mixture, yielding a custardy interior and a pleasant, slightly chewy texture.
- Accelerating the Drying Process: If your bread is fresh, you can easily speed up the drying process. Cut your bread into 1 ½-inch cubes and spread them out in a single layer on a baking sheet. Bake them in a preheated oven at 275℉ (135ºC) for 5-15 minutes. It’s important to monitor the bread closely, flipping the cubes occasionally, until they feel crusty and dry to the touch but are not yet browned. Allow them to cool completely before proceeding with the recipe.


Smart Substitutions for Your Casserole
While the recipe specifies certain ingredients, it’s flexible enough to accommodate common pantry staples or dietary preferences:
- Half-and-Half Substitute: If you don’t have half-and-half on hand, you can easily create your own. Combine 1 ½ cups of whole milk with 1 ½ cups of heavy cream to get the equivalent of 3 cups of half-and-half. This mixture will provide a similar richness and creaminess to the custard.
- Using Frozen Fruit: Frozen blueberries (or any other frozen fruit) can certainly be used in place of fresh. A common characteristic of frozen berries is that their color tends to spread more readily during baking. This might result in a slightly blue tint throughout your casserole, but rest assured, the flavor will remain absolutely delicious! There’s no need to thaw frozen fruit before adding it.
Exciting Variations to Elevate Your French Toast Casserole
This brioche French toast casserole is incredibly versatile, inviting you to experiment with different flavors and textures to create your own signature dish:
- Fresh Fruit Medley: Beyond blueberries, a myriad of fresh fruits can elevate this casserole. Try raspberries, finely chopped strawberries, blackberries, sliced peaches, or even thinly sliced apples. A combination of two or more fruits can also create a delightful blend of flavors and colors.
- Indulgent Chocolate: For an ultra-decadent breakfast, chocolate is always a good idea! Stir in some chocolate chips (milk, semi-sweet, or dark), chocolate chunks, or even swirls of Nutella into the layers. White chocolate chips, especially when paired with tart raspberries, make for an exquisite combination.
- Crunchy Nuts: Adding nuts is a fantastic way to introduce a satisfying crunch and nutty flavor. Chopped pecans, walnuts, or slivered almonds would be excellent choices. Imagine a “Banana Nut” version with sliced bananas and toasted walnuts – truly irresistible!
- Sweet Brown Sugar Topping: For an extra layer of sweetness and a caramelized crust, consider a brown sugar topping. Instead of some of the fruit, sprinkle about ¼ cup of brown sugar over the bottom layer of cubed brioche. You can also sprinkle an additional ¼ cup over the top of the casserole before baking for a wonderfully sweet and slightly crispy finish. For bonus points, add a few chopped nuts to this topping for added texture.
- Citrus Zest Boost: A little extra citrus zest (lemon or orange) mixed into the custard or sprinkled on top before baking can brighten the entire dish and add a fragrant aroma.

Recipe Frequently Asked Questions (FAQs)
Yes, it’s highly recommended to use dry or stale brioche for French toast, especially for a casserole. If your brioche is fresh, you should definitely dry it out. This allows the bread to absorb the custard mixture effectively without turning mushy or soggy during baking. You can achieve this by cutting the bread into cubes and leaving them exposed to the open air for several hours or overnight. For a quicker method, lightly toast the bread cubes in the oven at a low temperature until they are crusty but not browned.
For both traditional French toast and baked casseroles, the best breads are sturdy and have a good crumb that can withstand soaking. This prevents the bread from falling apart. Excellent choices include brioche (for its richness and tenderness), challah (another eggy, rich bread), French bread (like a baguette or bâtard), and sourdough. While almost any stale bread can work in a pinch, these types offer superior flavor and texture results.
Several factors can contribute to a soggy or “wet” French toast casserole. The most common reasons include using fresh bread that is too moist, which doesn’t absorb the custard properly and breaks down during baking. Other culprits can be using too much liquid (or not enough bread for the amount of custard), not allowing sufficient soaking time (at least 1 hour, but overnight is ideal), or not baking the casserole for a long enough duration to fully set the custard. Ensure your bread is stale or dried, and that you bake until the center is set and golden brown.
If you’ve enjoyed preparing this delightful Brioche French Toast Casserole, please consider leaving a 5-star review in the recipe card below or sharing your feedback in the comments section! Your ratings and comments help others discover and love this recipe too. You can also tag me on Instagram @dashfordinner to share your culinary creations!
Brioche French Toast Casserole Recipe
This simple recipe for Brioche French Toast Casserole is the easiest way to make French toast for a crowd – no dipping needed!

Course: Breakfast
Cuisine: American
Prep Time: 25 minutes
Soaking time: 1 hour (up to overnight)
Bake Time: 45-55 minutes
Total Time: 1 hour 25 minutes (plus soaking)
Servings: 8 servings
Calories: 432kcal
Author: Dorothy Bigelow
Equipment
- 9X13″ baking dish (23X33cm)
- Large mixing bowl
- Whisk
Ingredients
- 1 loaf Brioche bread (stale, cut into 1 ½” cubes, approx. 14 ounces)
- 2 cups blueberries (or fruit of choice)
- 6 large eggs
- 3 cups half and half (or 1 ½ cups whole milk and 1 ½ cups heavy cream)
- ½ cup packed brown sugar
- 1 tablespoon lemon juice
- 1 ½ teaspoons vanilla extract
- 1 ½ teaspoons ground cinnamon
- ½ teaspoon nutmeg
For serving (optional)
- Powdered sugar
- Maple syrup
- Whipped cream
- Fresh berries
Instructions
- Grease a 9X13” (23X33cm) baking dish.
- Place half of the bread cubes into the bottom of the baking dish in an even layer.
- Place 1 cup of the blueberries (or fruit of choice) over the top of the bread cubes.
- Place the remaining bread cubes over the blueberries. Then sprinkle the remaining blueberries over the bread cubes.
- In a large bowl, whisk together the eggs, half and half, brown sugar, lemon juice, vanilla, cinnamon, and nutmeg until well combined.
- Pour the egg mixture over the bread and blueberries, making sure to coat all of the pieces of bread. Use a spatula or spoon to gently press down on the top bread pieces to submerge them and ensure thorough soaking.
- Cover the dish tightly and let it rest in the fridge for at least an hour. For the best, most custardy results, allow it to soak overnight (8-12 hours). The bread needs to have fully soaked up the liquids before baking.
- When you’re ready to bake, place the cold baking dish into a cold oven. Set the oven temperature to 350℉ (177ºC) and allow it to gradually warm the baking dish as it preheats. This prevents temperature shock and reduces the likelihood of the dish breaking.
- Once the oven has preheated, start the timer and bake the casserole uncovered for 45-55 minutes, or until the egg mixture is cooked through and no longer runny in the center, and the surface is golden brown. If the top starts to brown too quickly, you can cover the dish loosely with aluminum foil and continue baking until finished.
- Serve warm. Garnish with desired toppings such as powdered sugar, maple syrup, whipped cream, or fresh berries.
Notes
- Stale bread: The bread needs to be stale and/or dry for the best French toast casserole. If your bread is fresh, cut it into cubes and bake it in the oven at 275℉ (135ºC) for 5-15 minutes until crusty but not browned. Flip regularly.
- Half-and-half substitute: Use 1 ½ cups of whole milk and 1 ½ cups of heavy cream to substitute for 3 cups of half-and-half.
- Cold oven baking: Placing the cold dish into a cold oven and then preheating gradually warms the casserole dish, preventing thermal shock and potential breakage.
Nutrition Information (per serving)
- Calories: 432kcal
- Carbohydrates: 43g
- Protein: 13g
- Fat: 24g
- Saturated Fat: 13g
- Polyunsaturated Fat: 1g
- Monounsaturated Fat: 4g
- Trans Fat: 0.01g
- Cholesterol: 244mg
- Sodium: 307mg
- Potassium: 223mg
- Fiber: 1g
- Sugar: 21g
- Vitamin A: 909IU
- Vitamin C: 5mg
- Calcium: 160mg
- Iron: 1mg
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