Upgrade your breakfast game with this luxurious Easy Overnight Croissant Breakfast Casserole. Instead of regular bread, this recipe uses buttery, flaky croissants soaked in a rich egg custard. Baked with savory sausage, spinach, and Gruyere cheese, it’s a dish that feels special enough for holidays but easy enough for weekends.
The croissants absorb the mixture while keeping their flaky tops, creating a texture contrast that is divine. It’s a savory bread pudding that feeds a crowd and makes your kitchen smell like a French bakery.
Why You’ll Love This Recipe
Buttery & Flaky
Croissants make everything better. They add a richness that standard bread can’t match.
Make-Ahead
Prep it the night before for a stress-free morning. For a lighter, sweet breakfast option to pair with this, try these Superfood Breakfast Cookies.
Ingredients
- 6 large croissants, torn
- 1 lb breakfast sausage, cooked
- 2 cups fresh spinach
- 2 cups Gruyere cheese, shredded
- 8 large eggs
- 1 cup heavy cream
- 1 cup milk
Instructions
- Layer torn croissants, cooked sausage, spinach, and cheese in dish.
- Whisk eggs, cream, milk, and seasonings. Pour over.
- Refrigerate overnight.
- Bake at 350°F for 45-55 mins.
- Serve warm.
Nutrition
Ingredient Highlights & Substitutions
Essential Ingredients
Large Croissants (stale/day-old). Breakfast Sausage. Spinach. Gruyere or Swiss Cheese. Eggs. Heavy Cream/Milk.
Smart Substitutions
Bacon or ham works instead of sausage. Cheddar can replace Gruyere.
Step-by-Step Instructions
Prep Phase
Tear croissants. Cook sausage and wilt spinach. Grease dish.
Cooking Phase
Layer croissants, meat, spinach, and cheese. Whisk eggs, cream, and milk. Pour over. Refrigerate overnight. Bake at 350°F for 45-55 mins.
Pro Tips for Perfect Results
Technique Secrets
Don’t press the croissants down too hard; let the tops stay fluffy for crunch.
Common Mistakes to Avoid
Undercooking. Make sure the center is set (not liquid) before pulling it out.
Serving Ideas & Pairings
Presentation & Plating
Serve squares with fresh berries on the side.
Pairing Suggestions
Mimosas and coffee.
Frequently Asked Questions
Q1? Can I use fresh croissants?
Leave them out on the counter for a few hours to dry out so they absorb liquid better.
Q2? Can I add mushrooms?
Yes, sauté them with the sausage.
Q3? How long does it keep?
3 days in the fridge.
| Nutrient | Amount per Serving |
|---|---|
| Calories | 510 kcal |
| Total Fat | 35g |
| Saturated Fat | 18g |
| Cholesterol | 240mg |
| Sodium | 850mg |
| Carbohydrates | 28g |
| Dietary Fiber | 2g |
| Protein | 18g |
Conclusion
This Easy Overnight Croissant Breakfast Casserole turns brunch into a special occasion. Decadent, delicious, and easy.
