Croissant Breakfast Casserole

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A delicious breakfast casserole made with croissants, ham, cheese, and eggs. Perfect for a holiday or weekend breakfast, or brunch.

Course Breakfast

Cuisine American

Prep Time 15

Cook Time 50

Soaking Time 30

Total Time 1 35

Servings people

Calories 448kcal

Lightly grease a 9x13 inch casserole dish.
Slice croissants into 1-2 inch pieces and place in casserole dish.
6 Croissants
Whisk eggs together with Dijon, salt, and pepper. Whisk in milk and cream.
6 eggs, 1 ½ cups milk, ½ cup cream, 1 tablespoon Dijon mustard, 1 teaspoon salt, ½ teaspoon pepper
Fold cheese (reserve ½ cup of Swiss for topping) and ham into the egg mixture.
4 ounces ham, 4 ounces Swiss cheese, 4 ounces cheddar cheese
Pour the egg mixture over the top of the croissants. Gently fold everything together so the ham and cheese are evenly distributed, and the croissant pieces have all come in contact with the egg mixture.
Rest casserole for at least 30 minutes or overnight. To rest overnight, cover and refrigerate. Remove from refrigerator 30 minutes before baking.
Gently fold everything together again before baking.
Top with reserved ½ cup of Swiss cheese.
Bake covered with foil in a preheated 350°F oven for 40 minutes.
Remove foil and continue baking for an additional 10-20 minutes until the top is slightly browned and the egg mixture is fully cooked.
Remove from oven and allow the casserole to rest for 5-10 minutes before serving.

Use slightly stale croissants. If your croissants are really fresh, cut them into pieces and let them sit out for at least 30 minutes before making the recipe.
Use sliced deli ham or leftover holiday ham.
The unbaked casserole needs to sit for at least 30 minutes before baking. This allows the croissants time to absorb some of the liquid before baking.
You can assemble up to 24 hours ahead of time. Cover and refrigerate.
To check to see if the casserole is fully baked, place a fork in the center of the casserole and gently separate the croissant pieces. If it's still gooey or has visible egg mixture, cook for a longer time.