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+ servings
ham and cheese casserole with gold spoon and thyme sprigs

Ham and Cheese Croissant Casserole

4.82 from 22 votes
Prep Time: 25 minutes
Cook Time: 35 minutes
Total Time: 1 hour
Buttery, cheesy, and oh so delicious! This Ham and Cheese Croissant Casserole is the ultimate breakfast bake.

Ingredients

  • 4 large eggs, beaten
  • cups heavy cream
  • ¾ cup milk
  • 1-2 Tablespoons olive oil
  • ½ cup chopped onion
  • ½ cup chopped mushrooms
  • ½ teaspoon chopped garlic
  • 6 ounces ham, chopped
  • ½ cup shredded cheddar cheese
  • 1 cup shredded fontina cheese
  • 4-5 sprigs thyme, stripped
  • 3 large croissant, cut into 2-inch cubes
  • Salt and pepper, to taste

Instructions

  • Preheat oven to 350 degrees.
  • Spray a 7"x10" casserole with cooking spray. Set aside.
  • Sauté onions and mushrooms in olive oil until onions are nearly translucent, 2-3 minutes.
  • Add garlic, and continue to cook for another 1-2 minutes. Set aside.
  • In a large bowl, whisk together eggs, cream, and milk.
  • Stir in ham, cheddar, fontina, thyme, and onion mixture.
  • Add bread cubes.
  • Season with salt and pepper.
  • Pour into prepared casserole and let stand for 15-20 minutes, until liquid is absorbed.
  • Bake for 35 minutes, or until set.

Notes

Substitutions:
  • You can use gruyère, provolone, or gouda instead of fontina.
  • We used hickory smoked ham, but feel free to use your favorite kind!
Expert Tips:
  • Make sure you let the croissants soak up the custard! It's the best way to get all the flavor.
  • When the casserole is "set" should still have a little bit of jiggle/movement in the middle. If you bake until fully set (no jiggle/movement in the middle), the casserole will be overcooked because it still cooks even after you get it out of the oven.
  • This casserole keeps really well and reheats.

Nutrition

Serving: 1sliceCalories: 370kcalCarbohydrates: 14gProtein: 17gFat: 28gSaturated Fat: 14gPolyunsaturated Fat: 2gMonounsaturated Fat: 9gTrans Fat: 1gCholesterol: 165mgSodium: 578mgPotassium: 240mgFiber: 1gSugar: 5gVitamin A: 852IUVitamin C: 2mgCalcium: 207mgIron: 1mg

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.