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Easy Overnight Croissant Breakfast Casserole with Ham and Swiss

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A simple and indulgent breakfast casserole featuring flaky croissants, savory ham, and melty Swiss cheese, soaked overnight and baked to golden perfection. Perfect for busy mornings or gatherings.

Ingredients

Scale
  • 6 large butter croissants, day-old or slightly stale, cut into chunks
  • 8 ounces deli ham, diced or sliced into bite-sized pieces
  • 8 ounces Swiss cheese, shredded or thinly sliced
  • 6 large eggs, room temperature
  • 2 cups whole milk (or 16 fl oz)
  • 1/2 cup heavy cream (4 fl oz)
  • 1 tablespoon Dijon mustard (optional)
  • 1 teaspoon salt
  • 1/2 teaspoon freshly ground black pepper
  • 2 tablespoons fresh herbs (chives or parsley), chopped (optional)
  • Pinch of nutmeg

Instructions

  1. Cut 6 butter croissants into roughly 1-inch chunks. Dice about 8 ounces of deli ham into bite-sized pieces. Toss them together gently in a large bowl.
  2. Shred or thinly slice 8 ounces of Swiss cheese and set aside.
  3. In a separate large mixing bowl, whisk together 6 large eggs, 2 cups whole milk, 1/2 cup heavy cream, 1 tablespoon Dijon mustard, 1 teaspoon salt, 1/2 teaspoon black pepper, and a pinch of nutmeg until smooth and slightly frothy.
  4. Fold the croissant and ham mixture into the custard gently. Add the shredded Swiss cheese and chopped fresh herbs, then stir gently to combine.
  5. Lightly butter or spray a 9×13-inch baking dish. Pour the mixture evenly into the dish. Cover tightly with aluminum foil and refrigerate overnight or at least 6 hours.
  6. Preheat oven to 350°F (175°C). Remove foil and bake casserole for 45-50 minutes until golden brown and custard is set. Tent with foil if top browns too quickly.
  7. Let casserole rest for about 10 minutes before slicing and serving.

Notes

Use day-old croissants to prevent sogginess. Soaking overnight improves texture and flavor. Tent with foil if top browns too quickly. Use room temperature eggs and milk for smooth custard. Toast fresh croissants lightly before cutting if needed.

Nutrition

Keywords: breakfast casserole, croissant casserole, ham and swiss, overnight casserole, easy breakfast, brunch recipe

Find it online: https://lirafood.com/easy-overnight-croissant-breakfast-casserole-with-ham-and-swiss-recipe-for-perfect-morning-meal/