Go Back
Croissant Egg Casserole

Croissant Egg Casserole

This Croissant Egg Casserole is the ultimate brunch and breakfast upgrade, transforming flaky croissants into a savory, satisfying baked dish perfect for any occasion. Its ease of preparation and crowd-pleasing flavors make it an instant favorite, ideal for busy mornings or relaxed weekend gatherings.
Prep Time 20 minutes
Cook Time 40 minutes
Soaking Time 15 minutes
Total Time 1 hour
Servings: 6 servings
Course: Breakfast, Brunch

Ingredients
  

  • 12-16 croissants, day-old or slightly stale buttery, flaky croissants are best
  • 8 large eggs
  • 2 cups milk whole milk or half-and-half for richness
  • 1/2 cup shredded cheddar cheese or a blend of your favorite cheeses like Gruyere, Monterey Jack
  • 1/4 cup finely chopped cooked ham, bacon, or sausage optional, but highly recommended
  • 1/4 cup finely chopped bell pepper any color
  • 1/4 cup finely chopped onion
  • 2 tablespoons chopped fresh chives or parsley plus more for garnish
  • 1 teaspoon Dijon mustard optional, but adds a nice tangy depth
  • to taste salt
  • to taste freshly ground black pepper
  • butter or cooking spray for greasing the baking dish

Equipment

  • 9x13-inch baking dish
  • Large Bowl
  • Whisk
  • Spatula

Method
 

  1. Begin by tearing or slicing the croissants into bite-sized pieces, roughly 1-inch cubes. It's best to use croissants that are a day old as they'll absorb the egg mixture better without becoming too mushy. Place these croissant pieces evenly in a greased 9x13-inch baking dish.
    12-16 croissants, day-old or slightly stale, butter or cooking spray
  2. In a large bowl, whisk together the 8 large eggs until the yolks and whites are thoroughly combined. Add the 2 cups of milk, the Dijon mustard (if using), salt, and pepper. Whisk until everything is well incorporated. The milk will create a rich, creamy base for the casserole.
    8 large eggs, 1 teaspoon Dijon mustard, to taste salt, to taste freshly ground black pepper
  3. Gently stir in the shredded cheese, chopped cooked meat (if using), bell pepper, onion, and half of the chopped chives or parsley into the egg mixture. This is where you can customize your casserole to your liking – think about adding spinach, mushrooms, or different types of cheese.
    1/2 cup shredded cheddar cheese, 1/4 cup finely chopped cooked ham, bacon, or sausage, 1/4 cup finely chopped bell pepper, 1/4 cup finely chopped onion, 2 tablespoons chopped fresh chives or parsley
  4. Pour the custard mixture evenly over the croissant pieces in the baking dish. Gently press down on the croissants with a spatula or your hands to ensure they are submerged in the liquid as much as possible. Allow the mixture to sit for at least 15-30 minutes at room temperature, or cover and refrigerate overnight for a deeper soak and more intense flavor. This soaking period is crucial for achieving that perfectly tender, custardy texture.
    12-16 croissants, day-old or slightly stale, 8 large eggs, 2 cups milk, 1/2 cup shredded cheddar cheese, 1/4 cup finely chopped cooked ham, bacon, or sausage, 1/4 cup finely chopped bell pepper, 1/4 cup finely chopped onion, 2 tablespoons chopped fresh chives or parsley, 1 teaspoon Dijon mustard, to taste salt, to taste freshly ground black pepper
  5. Preheat your oven to 350°F (175°C). Bake the casserole for 40-50 minutes, or until the top is golden brown, puffed up, and the center is set (a knife inserted near the center should come out clean). The baking time may vary slightly depending on your oven and how long the casserole has been soaking.
  6. Once baked, let the Croissant Egg Casserole rest for about 5-10 minutes before slicing and serving. This allows the casserole to set up properly. Garnish with the remaining fresh chives or parsley. Serve warm and enjoy the delightful blend of flavors and textures.
    2 tablespoons chopped fresh chives or parsley

Notes

This casserole can be refrigerated overnight before baking for a deeper soak and more intense flavor.
For longer storage, it can be refrigerated for up to 3-4 days or frozen for up to 1-2 months.
QR Code linking back to recipe