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Overnight Croissant Breakfast Casserole

Irresistible Overnight Croissant Breakfast Casserole You’ll Crave Again

This Overnight Croissant Breakfast Casserole is the perfect make-ahead dish for holidays, brunch, or busy mornings! Made with buttery croissants, savory sausage, creamy eggs, and melty cheese, it’s a warm, flaky, and indulgent breakfast that’s prepped the night before and baked to golden perfection in the morning.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 8 servings
Course: Breakfast
Cuisine: American
Ingredients Equipment Method

Ingredients
  

Ingredients
  • 5 large croissants (preferably day-old), torn into large chunks
  • 1 lb ground sausage, cooked and drained
  • 1 cup shredded cheddar cheese
  • 6 large eggs
  • 2 cups whole milk
  • 1 teaspoon salt
  • 0.5 teaspoon black pepper
  • 0.5 teaspoon garlic powder
  • 0.5 teaspoon onion powder
  • Fresh parsley, chopped (optional, for garnish)

Equipment

  • 9×13-inch baking dish

Method
 

Instructions
  1. Grease a 9×13-inch baking dish with cooking spray or butter.
  2. Layer torn croissants evenly in the dish.
  3. Sprinkle cooked sausage and shredded cheese over croissants.
  4. In a large bowl, whisk together the eggs, milk, salt, pepper, garlic powder, and onion powder.
  5. Pour the mixture evenly over the croissant layers.
  6. Gently press down with a spatula to help the croissants soak up the custard.
  7. Cover the dish with foil and refrigerate for at least 6 hours or overnight.
  8. Preheat oven to 350°F (175°C).
  9. Uncover the casserole and bake for 40–45 minutes, or until golden brown and set in the center.
  10. Let cool for 10 minutes, then garnish with fresh parsley and serve warm.