Buttery Overnight Croissant Breakfast Casserole Recipe
Buttery Overnight Croissant Breakfast Casserole turns leftover or day-old croissants into a rich, custardy breakfast bake that’s perfect for holidays, brunch gatherings, or a lazy weekend at home. The croissants soak up a sweet, buttery egg custard overnight, so all that’s left to do in the morning is bake.
This make-ahead casserole is as forgiving as it is delicious. Since it rests in the refrigerator overnight, the flavors have time to meld and the bread fully absorbs the custard, resulting in a soft, bread-pudding-like texture with crisp, golden edges.
What Is Buttery Overnight Croissant Breakfast Casserole
Buttery Overnight Croissant Breakfast Casserole is a baked breakfast dish made by layering torn croissants in a baking dish, soaking them in a sweet egg and milk custard, and refrigerating overnight before baking. The result is similar to a French toast bake, but the buttery, flaky texture of croissants makes it extra rich.
Why You Will Love This Recipe
- Made ahead the night before, so morning prep is minimal
- Turns day-old croissants into a rich, indulgent breakfast
- Great for feeding a crowd at brunch or the holidays
- Custardy inside with slightly crisp, buttery edges
- Easy to customize with add-ins like fruit or chocolate
Ingredients You Will Need
- 6 to 8 day-old croissants, torn into large pieces
- 6 large eggs
- 2 cups milk
- 1/2 cup heavy cream
- 1/2 cup sugar
- 1 tablespoon vanilla extract
- 1/2 teaspoon cinnamon
- Pinch of salt
- 2 tablespoons butter, melted, plus more for greasing the dish
- Powdered sugar and maple syrup, for serving
How to Make Buttery Overnight Croissant Breakfast Casserole Step-by-Step
- Grease a 9×13 inch baking dish with butter.
- Tear the croissants into large chunks and spread them evenly in the prepared dish.
- In a large bowl, whisk together the eggs, milk, heavy cream, sugar, vanilla extract, cinnamon, and salt until well combined.
- Pour the egg mixture evenly over the torn croissants, pressing down gently so the pieces soak up the custard.
- Drizzle the melted butter over the top.
- Cover the dish tightly and refrigerate overnight, or for at least 4 hours.
- When ready to bake, preheat the oven to 350 degrees F and let the dish sit at room temperature for 15 minutes.
- Bake, uncovered, for 40 to 45 minutes, until puffed, golden, and set in the center.
- Let the casserole rest for 5 to 10 minutes before serving.
- Dust with powdered sugar and serve warm with maple syrup.
Tips and Variations
- Add fruit: Fold in fresh berries or diced apples before baking for extra flavor and texture.
- Chocolate version: Sprinkle chocolate chips between the croissant layers for a richer, dessert-like casserole.
- Use stale croissants: Slightly stale croissants soak up the custard best, so day-old works better than fresh.
- Nutty topping: Sprinkle chopped pecans or almonds on top before baking for added crunch.
- Savory twist: Reduce the sugar and add shredded cheese and cooked bacon for a savory version of the bake.
Storage Tips and Frequently Asked Questions
Store leftover casserole covered in the refrigerator for up to 3 days. Reheat individual portions in the microwave, or warm the whole dish in a 325 degree F oven until heated through. This casserole can also be frozen after baking; thaw overnight in the refrigerator before reheating.
Can I assemble this the morning of instead of overnight?
Yes, though letting it sit overnight gives the best texture. If short on time, let it rest for at least 1 hour before baking.
Can I use croissants straight from the bakery?
Yes, day-old bakery croissants work great and tend to soak up the custard even better than very fresh ones.
What can I serve with this casserole?
Fresh fruit, crispy bacon, or sausage links pair nicely alongside this sweet, rich casserole.
Can I make this dairy-free?
Yes, substitute the milk and cream with your favorite non-dairy alternatives, keeping the ratios the same.
Final Thoughts
Buttery Overnight Croissant Breakfast Casserole is an easy way to turn simple ingredients into a memorable, crowd-pleasing breakfast. With most of the work done the night before, it’s an ideal choice for busy mornings when you still want something special on the table.