Overnight Croissant Breakfast Casserole Recipe
This Overnight Croissant Breakfast Casserole is a simple and delicious make-ahead dish perfect for busy mornings or brunch gatherings. Fluffy croissants are soaked in an egg and milk mixture, layered with cheese, then baked to golden perfection, creating a rich, savory breakfast casserole with a custardy interior and crispy top.
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Total Time: 8 hours 65 minutes
- Yield: 6-8 servings 1x
- Category: Breakfast Casserole
- Method: Baking
- Cuisine: American
Ingredients
Scale
Main Ingredients
- 4 large croissants, cut into 2-inch pieces
- 8 large eggs
- 2 cups whole milk
- 2 cups shredded cheese (cheddar, Gruyere, or a blend)
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- Optional: 1/2 teaspoon Dijon mustard for added flavor
Instructions
- Prepare Croissants: Cut the croissants into 2-inch chunks and place them evenly in a greased 9×13 inch baking dish.
- Make Custard Mixture: In a large bowl, whisk together the eggs, milk, salt, pepper, and optional Dijon mustard until fully combined and smooth.
- Assemble Casserole: Pour the egg mixture evenly over the croissant pieces in the baking dish. Sprinkle the shredded cheese evenly on top.
- Refrigerate Overnight: Cover the dish tightly with plastic wrap and refrigerate for at least 8 hours or overnight, allowing the croissants to soak up the custard mixture thoroughly.
- Bake: Preheat the oven to 350°F (175°C). Remove plastic wrap and bake uncovered for 45-50 minutes, or until the casserole is set, puffed, and golden brown on top.
- Cool and Serve: Let the casserole cool for 5-10 minutes before cutting into portions. Serve warm for a comforting breakfast or brunch.
Notes
- Leftover casserole can be refrigerated for up to 3 days and reheated in the oven.
- Add cooked bacon, sausage, or vegetables like spinach or mushrooms for added flavor and texture.
- Use day-old croissants for best results as they soak up the custard better without becoming too soggy.
- Try different types of cheese such as mozzarella, Swiss, or feta to vary the taste.
Keywords: overnight croissant breakfast casserole, baked breakfast casserole, make-ahead breakfast, croissant casserole, brunch recipe
