Irresistible Overnight Croissant Breakfast Casserole Recipe
This Overnight Croissant Breakfast Casserole is a delicious and indulgent make-ahead breakfast perfect for holidays, brunch, or busy mornings. Featuring buttery croissants, savory sausage, creamy eggs, and melty cheddar cheese, this casserole is prepared the night before and baked in the morning to golden perfection. It’s warm, flaky, and packed with comforting flavors that everyone will crave again.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Yield: 8 servings 1x
- Category: Breakfast, Brunch
- Method: Baking
- Cuisine: American
Ingredients
Scale
Main Ingredients
- 5 large croissants (preferably day-old), torn into large chunks
- 1 lb (450g) ground sausage, cooked and drained
- 1 cup (120g) shredded cheddar cheese
- 6 large eggs
- 2 cups (475ml) whole milk
- 1 teaspoon salt
- ½ teaspoon black pepper
- ½ teaspoon garlic powder
- ½ teaspoon onion powder
Garnish
- Fresh parsley, chopped (optional)
Optional Add-Ins & Swaps
- Cooked turkey, chicken, or plant-based sausage
- Swiss, Monterey Jack, or mozzarella cheese
- Sautéed spinach, mushrooms, or bell peppers
- Dash of hot sauce or red pepper flakes for a spicy kick
Instructions
- Prepare the Base: Grease a 9×13-inch baking dish with cooking spray or butter. Layer torn croissants evenly in the dish. Sprinkle cooked sausage and shredded cheese evenly over the croissants.
- Make the Egg Mixture: In a large bowl, whisk together the eggs, whole milk, salt, black pepper, garlic powder, and onion powder until fully combined. Pour the egg mixture evenly over the croissant, sausage, and cheese layers. Gently press down with a spatula to help the croissants soak up the custard.
- Refrigerate Overnight: Cover the baking dish with foil and place it in the refrigerator for at least 6 hours or overnight. This allows the croissants to absorb the egg custard fully, creating a tender and flavorful casserole.
- Bake in the Morning: Preheat the oven to 350°F (175°C). Remove the foil and bake the casserole uncovered for 40–45 minutes or until the top is golden brown and the center is set. Let the casserole cool for 10 minutes before slicing and serving. Optionally, garnish with fresh chopped parsley.
Notes
- Use day-old croissants for best texture; fresh croissants may become soggy after soaking.
- Let the casserole rest after baking to make slicing easier and to enhance flavors.
- For a crispier top, broil the casserole for 1–2 minutes at the end of baking.
- This casserole is freezer-friendly both before and after baking, making it great for meal prep.
Keywords: overnight breakfast casserole, croissant casserole, sausage breakfast bake, make-ahead breakfast, holiday brunch recipe
