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Overnight Croissant Breakfast Casserole

Deliciously Easy Overnight Croissant Breakfast Casserole

Enjoy a comforting Overnight Croissant Breakfast Casserole, perfect for busy mornings. Creamy, savory, and endlessly customizable, it's ideal for brunch or family gatherings.
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Prep Time 15 minutes
Cook Time 45 minutes
Chilling Time 8 hours
Total Time 9 hours
Servings: 8 slices
Course: Breakfast
Cuisine: American
Calories: 320
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Casserole
  • 5 large croissants Use day-old croissants for optimal absorption of flavors and a flaky texture.
  • 1 lb ground sausage Adds savory richness; swap with turkey, chicken, or plant-based sausage for a lighter option.
  • 1 cup shredded cheddar cheese Provides creaminess; consider mixing in Swiss or Monterey Jack for a flavor twist.
  • 6 large eggs Essential for creating the binding custard.
  • 2 cups whole milk Can be substituted with skim or plant-based milk if desired.
  • 1 teaspoon salt Vital for flavor enhancement; adjust to your liking if needed.
  • 0.5 teaspoon black pepper Adds mild spice; feel free to tweak based on taste.
  • 0.5 teaspoon garlic powder Lends savory depth.
  • 0.5 teaspoon onion powder Complements the other seasonings brilliantly.
For Garnishing
  • fresh parsley, chopped Provides a pop of color and freshness; optional.

Equipment

  • 9x13 inch baking dish
  • Skillet
  • mixing bowl

Method
 

Step-by-Step Instructions
  1. Tear five day-old croissants into large bite-sized chunks and place them in a greased 9x13 inch baking dish.
  2. In a skillet over medium heat, brown one pound of ground sausage until fully cooked.
  3. Drain excess fat and distribute sausage crumbles evenly over the croissant pieces.
  4. In a large mixing bowl, whisk together six eggs, two cups of whole milk, salt, black pepper, garlic powder, and onion powder until well combined.
  5. Pour the custard mixture over the croissants and sausage, pressing down any exposed croissant chunks.
  6. Cover the baking dish tightly and refrigerate for at least 8 hours or overnight.
  7. Preheat oven to 350°F (175°C) and bake the casserole for approximately 45 minutes until puffed and golden brown.
  8. Allow the casserole to rest for 5-10 minutes before cutting into it and garnish with parsley, if desired.

Nutrition

Serving: 1sliceCalories: 320kcalCarbohydrates: 25gProtein: 15gFat: 20gSaturated Fat: 8gPolyunsaturated Fat: 2gMonounsaturated Fat: 9gCholesterol: 210mgSodium: 700mgPotassium: 300mgFiber: 1gSugar: 2gVitamin A: 15IUVitamin C: 2mgCalcium: 20mgIron: 6mg

Notes

Using day-old croissants is key for absorption. Refrigerating overnight melds flavors, ensuring a delicious dish. Optionally, add extra cheese during the last minutes of baking for a cheesy finish.

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