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Overnight Brunch Croissant Breakfast Casserole Recipe

Overnight Brunch Croissant Breakfast Casserole Recipe


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4.8 from 35 reviews

  • Total Time: 6 hours 55 minutes to overnight plus 55-60 minutes
  • Yield: 6 1x

Description

Overnight Croissant Breakfast Casserole becomes your weekend breakfast hero, bringing French bakery charm straight to your kitchen table. Layers of buttery croissants, eggs, and cheese create a make-ahead morning marvel that saves precious time when breakfast needs to happen fast.


Ingredients

Scale

Main Ingredients:

  • 5 croissants
  • 1 lb (450g) ground sausage
  • 1 cup (120g) shredded cheddar cheese
  • 6 large eggs
  • 2 cups (475ml) whole milk

Supporting Ingredients:

  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • ½ teaspoon garlic powder
  • ½ teaspoon onion powder

Garnish (Optional):

  • Fresh parsley, chopped

Instructions

  1. Coat your 9×13-inch baking dish thoroughly with 2 tablespoons butter or cooking spray, ensuring complete surface coverage.
  2. Tear 5 large croissants (about 12 ounces/340g) into rustic chunks, distributing them evenly across the greased dish’s bottom.
  3. Sprinkle 1 pound (450g) fully cooked and drained ground sausage across the croissant layer, creating a uniform meat distribution.
  4. Scatter 1 cup (120g) shredded cheddar cheese over the sausage, covering the entire surface.
  5. Crack 6 large eggs into a mixing bowl, whisking them until completely smooth and uniform in color.
  6. Pour 2 cups (475ml) whole milk into the eggs, adding 1 teaspoon salt, ½ teaspoon black pepper, ½ teaspoon garlic powder, and ½ teaspoon onion powder.
  7. Blend the egg mixture until all seasonings are thoroughly incorporated and no streaks remain.
  8. Slowly pour the seasoned custard over the layered croissants, ensuring even distribution.
  9. Gently press down with a spatula, allowing croissants to absorb the liquid without breaking apart.
  10. Wrap the entire dish securely with aluminum foil.
  11. Refrigerate for 8 hours or overnight, allowing flavors to meld completely.
  12. Remove casserole from refrigerator 30 minutes before baking to reduce temperature shock.
  13. Preheat oven to 350°F (175°C) with rack positioned in center position.
  14. Unwrap the casserole and place directly in preheated oven.
  15. Bake for 45-50 minutes until center is set and top becomes golden brown.
  16. Remove from oven and rest for 10-12 minutes before serving.
  17. Garnish with freshly chopped parsley if desired.

Notes

  • Prep the casserole the night before to let croissants soak up all the delicious egg mixture, which helps create a rich, custardy texture.
  • For a lighter version, swap whole milk for half-and-half or use turkey sausage instead of traditional pork sausage.
  • Let the casserole rest for 10 minutes after baking so it sets properly and cuts cleanly, making serving easier.
  • Fresh herbs like chives or parsley brighten the dish and add a pop of color and fresh flavor to this hearty breakfast bake.
  • Prep Time: 15 minutes
  • Cook Time: 40-45 minutes
  • Category: Casseroles
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 6
  • Calories: 570 kcal
  • Sugar: 3 g
  • Sodium: 810 mg
  • Fat: 42 g
  • Saturated Fat: 18 g
  • Unsaturated Fat: 20 g
  • Trans Fat: 1 g
  • Carbohydrates: 24 g
  • Fiber: 1 g
  • Protein: 27 g
  • Cholesterol: 225 mg