
This banana croissant French toast casserole has become a weekend favorite at my house anytime we have leftover croissants and a ripe banana waiting to be used. It transforms simple bakery leftovers into a custardy breakfast that feels special but comes together with minimal effort.
When I first baked this for National Croissant Day the smell of sweet bananas and buttery croissants filled the house and everyone wandered into the kitchen asking what was in the oven.
Ingredients
- Whole milk: for silky custard and balanced richness use whole instead of low fat for best texture
- Heavy cream: brings extra creaminess giving that decadent bread pudding feel
- Large eggs: help set the custard so it holds together after baking
- Granulated sugar: provides balanced sweetness I like organic sugar for a hint of caramel flavor
- Vanilla extract: adds warm depth look for pure extract instead of imitation
- Banana extract: boosts natural banana flavor and takes this dish over the top
- Salt: sharpens the flavors just a pinch is all you need
- Ripe banana: for a mellow sweetness and creamy texture pick one with lots of brown spots but not mushy
- Day old croissants: soak up the custard and bake up tender inside and crisp on top the flakier the better
- Maple syrup: adds a finishing touch of sweetness when serving use real maple for best taste
Step-by-Step Instructions
- Prepare the Dish:
- Spray an eight-inch square baking dish with nonstick spray to prevent any sticking and set it aside within reach
- Make the Custard:
- In a large bowl whisk together one cup whole milk one cup heavy cream two eggs one cup sugar one tablespoon vanilla one tablespoon banana extract and a quarter teaspoon salt Whisk until completely smooth so the sugar dissolves completely and the liquids look uniform
- Soak the Croissants:
- Add your cut or torn pieces of croissant to the bowl and gently fold them in so every piece gets evenly coated Let this mixture sit for up to half an hour stirring halfway through This allows the croissants to soak up the creamy custard for maximum fluffiness
- Add the Bananas:
- After soaking gently pour the mixture into your prepared dish Arrange banana slices all over pressing them down among the croissant pieces so each serving gets some fruit in every bite
- Bake the Casserole:
- Place your dish on the middle oven rack and bake at three hundred fifty degrees Fahrenheit for about forty five to fifty minutes You will know it is ready when the custard no longer jiggles in the center and the top croissants are brown
- Rest and Serve:
- Let the casserole cool for about ten minutes before serving This gives the custard time to set and makes serving easier Pour maple syrup over the top right before eating

My favorite part is soaking the croissants and seeing them puff up in the oven The banana on top gets so caramelized my kids always plead for the corners where it gets extra golden and sweet
Storage Tips
Leftovers can be stored covered in the fridge for up to three days The custard stays creamy and the croissants keep their texture Warm slices in the microwave or bake at three hundred degrees until heated through
Ingredient Substitutions
Brioche or challah make a great swap if you do not have croissants Try almond extract for a nutty twist If you skip banana extract just use a second banana for extra fruit flavor
Serving Suggestions
Serve warm with a drizzle of pure maple syrup and extra banana slices on top For a brunch spread add fresh berries or a dollop of whipped cream This casserole pairs perfectly with hot coffee or chai tea

Cultural and Historical Context
This dish is a cross between French toast and classic bread pudding making it a beloved comfort food across many cultures Croissants bring French bakery flair while the banana and custard give it that American breakfast-for-dessert quality
Frequently Asked Questions
- → Can I prepare this casserole ahead of time?
Yes, assemble the dish the night before, cover, and refrigerate. Bake the next morning for best results.
- → What type of croissants work best?
Day-old croissants are ideal since they absorb the custard without becoming too soggy.
- → Can I substitute the banana extract?
If banana extract isn't available, use extra vanilla or a bit of mashed banana for added flavor.
- → How do I know when the casserole is done?
The custard should be set and the top golden brown. A knife inserted should come out mostly clean.
- → Is maple syrup necessary for serving?
While maple syrup adds sweetness, you can also serve with whipped cream or fresh berries.