Name: Brioche French Toast Casserole
Prep time: 30 min
Cook time: 45 min
Total time: 75 min
Ingredients: 6 Slices Brioche bread, cubed and toasted; 1 Cup Blueberries; 4 Oz. Light cream cheese, room temperature; 5 Eggs; 1 1/2 Cups Skim milk; 1/2 Tsp. Cinnamon; 1/4 Tsp. Freshly grated nutmeg; 1/2 Cup Swerve brown sugar; 1/2 Tbsp. Pure Vanilla extract; Zest of one lemon to finish; Sugar Free Maple Syrup to serve; Fresh blueberries to serve; 1/2 Cup Swerve brown sugar; 1/4 Cup All-purpose flour; 1/4 Tsp. Cinnamon; 1/4 Tsp. Kosher Salt; 2 Tbsp. Hazelnuts, chopped; 2 Tbsp. Butter, cut into small pieces; Cooking spray

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What Is Brioche French Toast Casserole — And Why Is It So Good?

If you’ve ever wished you could enjoy all the buttery, custardy joy of classic French toast without standing over a hot griddle on a busy morning, this brioche french toast casserole is your answer. At its heart, it’s a baked version of French toast — thick cubes of rich brioche bread are layered in a casserole dish with blueberries and dollops of cream cheese, soaked overnight in a spiced egg custard, and then topped with a crunchy brown sugar and hazelnut streusel before baking. The result is something that sits perfectly between a bread pudding and a soufflé: golden and crisp on top, soft and pillowy inside, with little pockets of warm berry and creamy cheese in every bite.

What makes this version especially special is that it’s been thoughtfully lightened up — less sugar, less saturated fat — without sacrificing any of that indulgent flavor. The star of the show remains the brioche itself. Its naturally buttery, slightly sweet crumb soaks up the custard like no other bread can. Think of it as the upgrade your brunch table has been waiting for. If you love recipes that use brioche to its fullest potential, and really dig French toast, you’ll also want to check out my Lemon Brioche French Toast with Whipped Ricotta and Raspberries — it’s a showstopper on its own.

Why This Recipe Works + Key Takeaways

Why This Recipe Works

Brioche is the secret weapon. Its rich, egg-enriched dough creates a tender, custardy interior that cheaper sandwich bread simply can’t match. It absorbs the egg mixture deeply without turning to mush.
The overnight soak is everything. Resting in the refrigerator gives the custard time to fully penetrate every cube of bread, so each bite is evenly flavored and cooked through.
Toasting the bread first prevents sogginess. A quick trip to the oven before assembly dries the bread out, allowing it to soak up maximum custard without falling apart.
The streusel topping adds contrast. That crumbly, nutty topping bakes into a satisfying crunch that plays beautifully against the soft, pillowy interior.
It’s a make-ahead dream. Nearly all the work happens the night before, making the morning completely stress-free.

Key Takeaways

Prep the night before for an effortless morning
Uses lighter ingredients without compromising on flavor
Serves 4–6 people generously — great for a crowd
Easily customizable with different fruits, nuts, or toppings
Just as good reheated, making it a great meal-prep brunch option

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Brioche French Toast Casserole Ingredients

Note: Amounts are listed in the recipe card below. Here’s why each ingredient earns its place.

Brioche Bread — The foundation of this entire dish. Brioche’s high butter and egg content gives it a rich flavor and a delicate crumb that soaks up the custard like a dream. It’s truly irreplaceable here.

Blueberries — These little gems burst during baking, creating jammy pockets of sweet-tart flavor throughout the casserole. Blueberries are also packed with antioxidants, making this bake feel a little more virtuous.

Light Cream Cheese — Dolloped in small mounds throughout the layers, the cream cheese melts into silky, tangy little pockets that contrast beautifully with the sweet custard. Using light cream cheese keeps the saturated fat in check.

Eggs — The backbone of the custard. Eggs provide structure, richness, and that quintessential French toast texture once baked.

Skim Milk — Thins the custard to the right consistency and helps the eggs form a smooth, pourable mixture. Using skim milk instead of heavy cream significantly cuts calories without sacrificing the final texture.

Cinnamon — Adds warmth and that cozy, familiar spice note we associate with great French toast.

Freshly Grated Nutmeg — Freshly grated nutmeg has a brightness and complexity that ground nutmeg from a jar just can’t replicate. It’s a small step that makes a noticeable difference.

Swerve Brown Sugar (Casserole + Topping) — Used both in the custard and in the streusel topping. Swerve is a calorie-free brown sugar substitute that bakes beautifully. Of course, real brown sugar works just as well if that’s your preference.

Pure Vanilla Extract — Rounds out the custard with warmth and depth. Use pure extract, not imitation — it shows in the flavor.

All-Purpose Flour (Topping) — Helps bind the streusel topping together into satisfying crumbles.

Kosher Salt (Topping) — A small amount of salt in the topping is key. It balances the sweetness and makes all the other flavors pop.

Butter (Topping) — Cut into the streusel dry ingredients to create those irresistible crumbly clusters. Two tablespoons goes a long way here.

Hazelnuts, Chopped (Topping) — Add a toasty, nutty crunch to the streusel. Their slightly earthy flavor pairs wonderfully with blueberries and cinnamon.

Lemon Zest (To Finish) — Zested over the top just before serving, lemon zest brightens everything up and adds a fragrant pop of freshness that cuts through the richness.

Sugar-Free Maple Syrup (To Serve) — A drizzle of warm maple syrup is the finishing touch. Sugar-free syrup keeps the calorie count lower, but real maple syrup is absolutely welcome here.

Fresh Blueberries (To Serve) — A handful of fresh berries alongside each serving adds color, freshness, and a lovely textural contrast to the warm, baked casserole.

Possible Ingredient Substitutions

This baked french toast with brioche is quite flexible. Here are some easy swaps depending on what you have on hand:

Brioche Bread → Challah bread is the closest substitute — it’s similarly rich and egg-enriched. A thick-cut Texas toast or a good French baguette will also work in a pinch, though the flavor won’t be quite as buttery.

Blueberries → Raspberries, blackberries, sliced strawberries, or a mix of berries all work beautifully. Diced peaches or pears are wonderful in the fall and winter months.

Light Cream Cheese → Full-fat cream cheese works perfectly. You can also substitute ricotta cheese for a lighter, fluffier texture. For a dairy-free option, use a plant-based cream cheese.

Skim Milk → Whole milk, 2%, oat milk, or almond milk can all substitute. For a richer, more indulgent casserole, half-and-half or heavy cream are excellent options.

Swerve Brown Sugar → Regular brown sugar, coconut sugar, or maple sugar all work. Use a 1:1 swap.

Freshly Grated Nutmeg → Ground nutmeg from your spice rack works fine. Use just a pinch, as it can be more potent than freshly grated.

Hazelnuts → Pecans, walnuts, sliced almonds, or even pumpkin seeds make great streusel alternatives.

Vanilla Extract → A small amount of almond extract adds a lovely variation. Use about half the amount, as it’s stronger.

How to Make Brioche French Toast Baked Casserole

Follow these steps and you’ll have an absolutely perfect result every time. Most of the work happens the night before, making the actual morning effortless.

Step 1: Toast and Dry the Brioche

Preheat your oven to 350°F. Cut your brioche bread into one-inch cubes and spread them out in a single layer on a baking sheet. Bake for about 20 minutes, tossing once halfway through, until the cubes are lightly golden and dried out. Remove from the oven and let them cool completely before assembling. This step is important — it keeps the casserole from becoming soggy. Don’t want to turn the oven on the night before? You can also cut the bread into cubes and leave them uncovered on the counter overnight to dry out naturally, or simply start with day-old stale brioche.

Step 2: Assemble the Layers

Spray a 9×7-inch casserole dish generously with cooking spray. Add about half of the toasted brioche cubes in an even layer. Scatter half of the blueberries over the bread, then drop teaspoon-sized dollops of cream cheese throughout. Make sure your cream cheese is at room temperature — it will be much easier to work with and distribute evenly. Repeat the layers with the remaining bread, blueberries, and cream cheese. Depending on the size of your baking dish, you may need two or three layers.

Step 3: Make the Egg Custard

In a large mixing bowl, whisk together the eggs, skim milk, cinnamon, freshly grated nutmeg, brown sugar, and vanilla extract until smooth and well combined. Take a moment here — whisking thoroughly ensures the sugar is fully dissolved and the spices are evenly distributed throughout the custard.

Step 4: Soak Overnight

Pour the custard mixture evenly over the assembled casserole. Press the bread cubes down gently with a spatula to make sure everything is saturated. Cover the dish tightly with aluminum foil and refrigerate overnight, or for a minimum of 4–6 hours. This rest time is non-negotiable — it’s what transforms this from a simple bake into a deeply flavorful, custardy casserole.

Step 5: Make the Streusel Topping

The next morning, remove the casserole from the refrigerator and preheat the oven to 350°F. While the oven heats, make your streusel. In a small bowl, whisk together the brown sugar, all-purpose flour, cinnamon, and kosher salt. Add the butter pieces and use the back of a fork to cut the butter into the dry ingredients, pressing and smashing until crumbly clusters form. Stir in the chopped hazelnuts. The topping should look like coarse, sandy crumbles.

Step 6: Top and Bake

Sprinkle the streusel evenly over the top of the casserole. Lightly spray the entire top with cooking spray — this helps the topping achieve a beautiful, even golden-brown color. Bake uncovered for 45 minutes to 1 hour, until the center is set (no longer jiggles when you gently shake the dish) and the top is golden and fragrant. Check at the 45-minute mark: if the topping is browning too quickly, tent loosely with foil for the remaining time.

Step 7: Rest, Finish, and Serve

Remove the casserole from the oven and let it rest for at least 10 minutes before cutting — this allows the custard to fully set and makes for cleaner slices. Just before serving, zest a fresh lemon over the top for a bright, fragrant finish. Serve warm with sugar-free (or real) maple syrup and fresh blueberries on the side.

How to Serve Brioche French Toast Casserole — and When

How to Serve

Cut the casserole into generous squares and serve directly from the baking dish. A dusting of powdered sugar is a lovely visual touch. Drizzle warm maple syrup over each slice, add a handful of fresh blueberries, and finish with that final zest of lemon. For an extra-special presentation, a small dollop of whipped cream or a spoonful of Greek yogurt alongside is wonderful.

For a complete brunch spread, pair this casserole with a simple green salad, a bowl of fresh fruit or my exotic fruit salad, and a pot of good coffee. It’s rich and satisfying, so sides don’t need to be elaborate.

When to Serve

This overnight brioche french toast casserole was practically invented for special mornings. It’s ideal for:

Holiday mornings — Christmas, Easter, Thanksgiving, and Mother’s Day mornings are made so much easier when the main dish is already assembled and waiting in the fridge.
Weekend brunch gatherings — It serves 4–6 comfortably, making it the perfect anchor dish for a brunch party.
Overnight guests — Assemble the night before, sleep in, and pull it out in the morning while coffee brews. Your guests will think you worked for hours.
Lazy Sunday mornings — Sometimes you just want a beautiful brunch without a lot of effort. This delivers.
Baby or bridal showers — It travels and presents beautifully right in the baking dish.

Storing and Reheating Leftovers

Storing

Let the casserole cool completely before storing. Cover the baking dish tightly with plastic wrap or foil and refrigerate for up to 3–4 days. Individual slices can also be transferred to an airtight container for easy grab-and-go portions.

To freeze, cut into individual portions, wrap each piece tightly in plastic wrap, and then in foil. Store in a freezer-safe bag or container for up to 2 months. Thaw overnight in the refrigerator before reheating.

Reheating

Oven (best method): Preheat to 325°F. Cover the casserole with foil and warm for 15–20 minutes until heated through. Remove the foil for the last 5 minutes to re-crisp the topping.

Individual slices in the oven: Place a slice on a baking sheet, cover loosely with foil, and heat at 325°F for 10–12 minutes.

Microwave (quickest method): Cover a single slice with a damp paper towel and microwave on 50% power in 30-second intervals until warm. Note that the streusel topping will soften in the microwave, so the oven method is preferred for the best texture.

Frequently Asked Questions

What is the best bread for a French toast casserole?

Brioche is widely considered the gold standard for French toast casserole because of its high butter and egg content, which creates a tender, moist crumb that absorbs custard deeply without falling apart. Challah is a close second. Both produce a richer, more flavorful result than regular sandwich bread.

Can I make brioche french toast casserole without soaking overnight?

While overnight soaking delivers the best results, you can soak the casserole for a minimum of 4 hours if needed. The longer the bread sits in the custard, the more evenly it absorbs, resulting in a more uniform texture throughout. If you’re short on time, press the bread down gently several times to encourage absorption.

What is the difference between French toast casserole and bread pudding?

They are very similar! Both soak bread in an egg-and-milk custard and bake it. French toast casserole typically uses a higher ratio of eggs and includes classic French toast flavorings like cinnamon, vanilla, and nutmeg, giving it a lighter, fluffier texture. Bread pudding often uses a richer custard and may include additional mix-ins like raisins or a sauce served alongside.

Can I make this brioche french toast casserole ahead of time and freeze it?

Yes! Bake the casserole fully, let it cool completely, then wrap and freeze individual portions for up to 2 months. Reheat from thawed in a 325°F oven covered with foil until warmed through.

How do I know when the French toast casserole is done baking?

The casserole is ready when the center no longer jiggles when you gently shake the dish, the top is golden brown, and a knife inserted in the center comes out without liquid custard running. This typically takes 45 minutes to 1 hour at 350°F.

Can I use frozen blueberries in this recipe?

Yes! Frozen blueberries work well in this casserole. Add them directly from frozen without thawing to prevent them from staining the custard. The color will bleed slightly into the surrounding bread, which tastes just as delicious.

Is brioche french toast casserole healthy?

This version has been lightened up significantly compared to traditional recipes. Using light cream cheese, skim milk, and a brown sugar substitute reduces calories and saturated fat without sacrificing flavor. Blueberries also contribute antioxidants and fiber to the dish. As with any breakfast casserole, portion size is key — a reasonable serving as part of a balanced brunch is perfectly sensible.

Can I make this casserole without nuts?

Absolutely. The hazelnuts can simply be omitted from the streusel topping. The crumble will still be delicious. You can also substitute with seeds like pumpkin or sunflower seeds for a nut-free version.

Why do I need to toast the brioche before assembling?

Toasting the bread cubes removes excess moisture, which allows them to absorb more of the egg custard without becoming overly soggy or mushy during the overnight soak. It also adds a slightly toasty flavor that makes the final casserole taste more complex.

What can I substitute for Swerve brown sugar in this recipe?

Regular brown sugar, coconut sugar, or any other granulated sweetener can be used in a 1:1 ratio. Real brown sugar will add a deeper molasses note that is absolutely delicious.

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If you enjoyed this recipe, please leave a comment and rating below. I’d love to hear from you. Did you make any substitutions? You know I want to know…please share!

Brioche French Toast Casserole