Description

This Overnight Croissant Breakfast Casserole is a delicious and hearty morning meal featuring buttery croissants, savory breakfast sausage, and melted cheddar cheese soaked in a flavorful custard. Prepared the night before and baked in the morning, this casserole is perfect for busy mornings or brunch gatherings, offering a comforting blend of textures and tastes.

Ingredients

Scale

Casserole Base

6 large croissants, cut into pieces
1 lb breakfast sausage, cooked and crumbled
2 cups shredded cheddar cheese

Egg Mixture

6 large eggs
2 cups milk
1 teaspoon dry mustard
1/2 teaspoon salt
1/4 teaspoon black pepper

Instructions

Prepare the Baking Dish: Grease a 9×13-inch baking dish to prevent sticking, then evenly spread the croissant pieces across the bottom of the dish to form the base layer.
Add Sausage and Cheese: Sprinkle the cooked and crumbled breakfast sausage evenly over the croissants, followed by an even layer of shredded cheddar cheese to create flavorful layers.
Make the Egg Mixture: In a large bowl, whisk together the eggs, milk, dry mustard, salt, and black pepper until the mixture is smooth and well combined, forming the custard base for the casserole.
Assemble the Casserole: Pour the egg mixture over the layered croissants, sausage, and cheese. Gently press down on the ingredients to help the croissants soak up the liquid evenly.
Refrigerate: Cover the assembled casserole tightly with plastic wrap and refrigerate overnight or for at least 2 hours to allow flavors to meld and the croissants to absorb the custard.
Bake: Preheat your oven to 350°F (175°C). Remove the casserole from the refrigerator and let it come to room temperature while the oven heats. Bake uncovered for 40-45 minutes, or until the top is golden brown and the custard is set in the center.
Serve: Allow the casserole to cool for a few minutes after baking. Slice into portions and serve warm for a satisfying breakfast or brunch.

Notes

You can substitute the breakfast sausage with cooked bacon or ham according to preference.
Using day-old croissants helps them absorb the custard better without becoming too soggy.
The casserole can be assembled up to 24 hours in advance for convenience.
Add vegetables like sautéed spinach, bell peppers, or mushrooms for extra nutrition and flavor.
Ensure the custard is fully set before removing from the oven to avoid a runny center.

Prep Time: 15 minutes
Cook Time: 40-45 minutes
Category: Breakfast
Method: Baking
Cuisine: American

Keywords: overnight croissant casserole, breakfast casserole recipe, sausage and cheddar casserole, make ahead breakfast, savory breakfast bake