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Cheesy Croissant Casserole

A delightful and indulgent casserole combining flaky croissants, eggs, crispy bacon, and delicious cheeses, perfect for breakfast or brunch gatherings.
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Prep Time 30 minutes
Cook Time 45 minutes
Total Time 1 hour 15 minutes
Servings: 8 servings
Course: Breakfast, Brunch
Calories: 450
Ingredients Method Notes

Ingredients
  

Main ingredients
  • 6 large croissants, quartered Good quality for best flavor.
  • 6 slices bacon Cook until crispy.
  • 8 eggs
  • 3 cups milk (preferably whole)
  • 1 cup heavy cream Can be substituted with more milk for a lighter version.
  • 2 Tbsp. finely chopped chives
  • 2 tsp. chopped thyme leaves Fresh herbs recommended.
  • Kosher salt To taste.
  • Freshly ground black pepper To taste.
  • Pinch cayenne For added spice.
  • 1 cup shredded Gruyere, divided Reserve some for topping.
  • 1 cup shredded mozzarella, divided Reserve some for topping.
  • Butter, for pan For greasing the baking dish.

Method
 

Preparation
  1. Preheat your oven to 450 degrees Fahrenheit.
  2. Place the croissants on a large baking sheet, cut side up, and bake until golden brown, about 6 minutes.
  3. In a large skillet over medium heat, cook the bacon until crispy, about 8 minutes, then drain on paper towels and chop into bite-sized pieces.
  4. In a large bowl, whisk together the eggs, milk, heavy cream, chives, and thyme until well combined.
  5. Season with Kosher salt, black pepper, and a pinch of cayenne. Fold in 3/4 cup each of Gruyere and mozzarella cheese.
  6. Butter the bottom and sides of a 9 by 13-inch baking dish.
Assembly
  1. Scatter the quartered croissants in the baking dish, followed by the chopped bacon.
  2. Pour the egg mixture over the croissants and bacon, pressing down to ensure the croissants soak up the mixture.
  3. Cover and refrigerate for 30 minutes to overnight.
Baking
  1. Preheat oven to 350 degrees Fahrenheit.
  2. Sprinkle on the remaining cheeses and bake for about 45 minutes, or until golden brown.
  3. Garnish with chives if desired and serve warm.

Notes

This casserole can be made ahead for stress-free entertaining. Customize with sautéed vegetables or different cheeses as desired.