This French Toast Brioche Casserole is the ultimate overnight breakfast casserole with brioche, perfect for holidays, special occasions, and stress-free mornings. Made with rich brioche bread soaked in a sweet, custardy vanilla cinnamon mixture, this brioche French toast casserole overnight bakes up soft on the inside with golden edges. Simply prep it the night before and bake in the morning for a warm, comforting breakfast everyone loves.
If you’re looking for an easy overnight French toast brioche casserole that feels indulgent but requires minimal morning effort, this recipe is it.
Why You’ll Love This Brioche French Toast Casserole
- Perfect make-ahead breakfast – Assemble the night before and bake fresh in the morning
- Ideal for holidays & brunch – Great for Christmas morning, Easter brunch, birthdays, and weekends
- Soft, rich, and custardy – Brioche bread creates the best texture for French toast casserole
- Crowd-pleasing recipe – Easy to double for guests or meal prep
Ingredients You’ll Need
- 1 loaf brioche bread (or baguette or leftover bread)
- 1/2 cup milk
- 8 large eggs
- 2/3 cup brown sugar
- 2 teaspoons vanilla extract
- 1 teaspoon cinnamon
- 1 cup blueberries (fresh or frozen)
- 1/2 cup sliced strawberries (or frozen mixed berries)
- Powdered sugar, for serving
How to Make French Toast Casserole with Brioche
- Spray a 9×6-inch casserole dish with non-stick spray. Cut the brioche into bite-sized cubes and spread evenly in the dish.
- In a large bowl, whisk together the milk, eggs, brown sugar, vanilla, and cinnamon until fully combined.
- Pour the custard mixture evenly over the bread, making sure all pieces are soaked.
- Sprinkle blueberries and sliced strawberries over the top.
- Cover tightly and refrigerate overnight (or at least 4 hours).
- Preheat the oven to 350°F. Remove the casserole from the fridge and uncover.
- Bake for 35–40 minutes, or until set in the center and lightly golden.
- Cool slightly, dust with powdered sugar, and serve warm.
Tips for the Best Overnight Brioche French Toast Casserole
- Brioche works best because of its buttery, enriched texture, but challah or sourdough also work well
- Overnight chilling allows the custard to fully absorb for the best texture
- Frozen berries can be used straight from the freezer—no thawing required
- For extra indulgence, serve with maple syrup or whipped cream
When to Serve Brioche French Toast Casserole
- Christmas morning or Easter brunch
- Baby showers and bridal brunches
- Weekend family breakfasts
- Make-ahead breakfasts for busy mornings
Make-Ahead & Storage Instructions
- Assemble up to 24 hours in advance and store covered in the refrigerator
- Store leftovers in an airtight container for up to 3 days
- Reheat individual servings in the microwave or oven
Brioche French Toast Casserole Overnight
This French toast casserole with brioche is rich, comforting, and effortless to prepare. Whether you’re hosting a holiday breakfast or planning ahead for a busy morning, this overnight brioche French toast casserole delivers bakery-style flavor with minimal work.
Make it once, and it’ll become a family tradition.
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French Toast Brioche Casserole
- Total Time: 0 hours
- Yield: 8 1x
Description
Perfect for a make-ahead breakfast with fresh berries and a custardy base, this easy casserole is ideal for holidays or special occasions.
Ingredients
- 1 whole baguette (or brioche or leftover bread)
- 1/2 cup milk
- 1 teaspoon cinnamon
- 2 teaspoons vanilla extract
- 2/3 cup brown sugar
- 8 large eggs
- 1 cup blueberries (or 1/2 cup as called for)
- 1/2 cup strawberries, sliced (or frozen berries)
- Powdered sugar for garnish
Get Recipe Ingredients
Instructions
-
Prepare the Dish:
Spray a 9×6-inch casserole pan with non-stick spray. Slice the baguette (or brioche) into chunks and arrange them in the pan. -
Make the Custard:
In a large bowl, whisk together the milk, cinnamon, vanilla, brown sugar, and eggs until fully combined. -
Assemble the Casserole:
Pour the egg mixture evenly over the bread, ensuring all the bread pieces are well-coated. Sprinkle the blueberries and sliced strawberries over the top. -
Chill Overnight:
Cover the casserole with plastic wrap and refrigerate overnight (or for at least 4 hours). -
Bake:
Preheat the oven to 350°F the next morning. Remove the plastic wrap and bake for 35-40 minutes, or until the casserole is golden and set in the middle. -
Serve:
Let the casserole cool slightly before dusting with powdered sugar and serving warm.
- Cook Time: 1 hour + overnight
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