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Easy Cheesy Ham and Cheese Croissant Casserole

ham and cheese croissant casserole - featured image
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A comforting and easy breakfast casserole combining flaky croissants, savory ham, and melted sharp cheddar cheese soaked in a creamy egg custard. Perfect for brunch or busy mornings.

Ingredients

Scale
  • 6 large day-old croissants, torn into 2-inch pieces
  • 2 cups cooked ham, diced (smoky or honey-glazed preferred)
  • 2 cups sharp cheddar cheese, shredded
  • 6 large eggs, room temperature
  • 2 cups whole milk (2% works fine)
  • 1 tablespoon Dijon mustard
  • 1/2 teaspoon salt
  • 1/4 teaspoon freshly ground black pepper
  • 1 tablespoon butter (for greasing casserole dish)
  • Optional: 1/4 cup chopped green onions or chives
  • Optional: 1/2 cup grated Parmesan cheese
  • Optional: 1 cup spinach or sautéed mushrooms

Instructions

  1. Preheat oven to 350°F (175°C). Butter a 9×13 inch casserole dish.
  2. Tear or roughly chop day-old croissants into bite-sized pieces (about 2-inch chunks).
  3. In a large bowl, whisk together eggs, milk, Dijon mustard, salt, and black pepper until smooth.
  4. Spread half of the croissant pieces evenly in the casserole dish.
  5. Sprinkle half of the diced ham and half of the shredded cheddar over the croissants.
  6. Repeat layering with remaining croissants, ham, and cheese.
  7. Pour the custard mixture evenly over the layered ingredients, pressing down gently to help croissants absorb the liquid.
  8. If using optional add-ins (green onions, spinach, mushrooms), sprinkle them evenly on top before baking.
  9. Cover loosely with foil and refrigerate for at least 30 minutes or up to overnight to let croissants soak up custard.
  10. Remove foil and bake uncovered for 40-45 minutes until top is golden brown and custard is set (knife inserted should come out clean).
  11. Let casserole cool for about 10 minutes before slicing and serving.

Notes

Use day-old croissants for best texture to avoid sogginess. Letting the casserole rest in the fridge for at least 30 minutes improves custard absorption and texture. Watch baking time closely to prevent over-browning; tent with foil if needed. This casserole can be made ahead and refrigerated overnight before baking. It freezes well before baking; thaw overnight before cooking.

Nutrition

Keywords: croissant casserole, ham and cheese casserole, breakfast casserole, brunch recipe, cheesy casserole, easy breakfast, comfort food

Find it online: https://lunafeast.com/easy-cheesy-ham-and-cheese-croissant-casserole-recipe-for-perfect-breakfast/