Name: Ham and Cheese Croissant Casserole
Prep time: 25 min
Cook time: 35 min
Total time: 60 min
Ingredients: 4 large eggs, (beaten); 2/3 cups heavy cream; 3/4 cup milk; 1-2 Tablespoons olive oil; 1/2 cup chopped onion; 1/2 cup chopped mushrooms; 1/2 teaspoon chopped garlic; 6 ounces ham, (chopped); 1/2 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)

Jump to Recipe

Making the holiday mornings extra special with this Ham and Cheese Croissant Casserole. Buttery croissants, cheddar cheese, fontina cheese, onion, ham, and mushrooms, all mixed together in an extra creamy custard, then baked until the casserole is golden and perfectly set. This casserole is everything you’re going to need this holiday season! It looks and tastes like it takes a lot of effort to make, but it’s actually oh so easy! It takes no time at all to make and tastes seriously delicious. The best part? It’s just as good for breakfast as it is dinner. Oh, and you can easily prep this ham and cheese casserole in advance, then bake it Christmas morning just before you’re ready to serve. It’s the perfect bake for all of your holiday entertaining needs!

Overhead shot of ham and cheese casserole on marble counter with gold spoon and napkin

→ This post is also available as a Web Story: Ham and Cheese Croissant Casserole

About The Recipe

One of my favorite things since I was little has always been a good ham and cheese sandwich. It’s my go to lunch or late night snack. It’s buttery, cheesy, and oh so delicious. Now? We’ve turned it into a delicious breakfast casserole…that totally works as dinner, too!

Trust me, we’ve kinda had this for dinner once or twice. It’s rich, cheesy, and so good!

ham and cheese casserole with two slices behind and gold spoon

This holiday season has been a little bit different for all of us, but we have some family around this year and it’s been so nice! But, we’ve been in need of breakfast pretty much everyday. Something quick, easy, and definitely something everyone will love.

We had some croissants laying around that needed to be used up, some hickory smoked ham we had just bought, and lots of cheese. We had been kicking around the idea of baking some casseroles because it’s the holiday’s and we all need some extra comfort.

This casserole is everything we were looking for and needed!

overhead shot of casserole with a slice taken out of it

Buttery, cheesy, and loaded with vegetables. Mushrooms, garlic, and onions to be exact. It’s the perfect combination of everything to create the perfect breakfast.

Equipment Needed

Mixing Bowls
Casserole

Ingredients

Eggs
Heavy Cream
Whole Milk
Olive Oil
Onions
Mushrooms
Garlic
Ham
Cheddar Cheese
Fontina Cheese
Thyme
Croissants

Croissants, ham, cheddar cheese, onion, thyme, milks,mushrooms, garlic, fontina, and eggs on marble counter

Instructions

Sauté the onions and mushrooms in olive oil until the onions are translucent, about 2-3 minutes. Stir in garlic and sauté for another minute or so. Set aside.

Sautéed onions and mushrooms in small pan

In a large bowl, whisk together eggs, heavy cream, and milk. Season with salt and pepper.

Slice the croissants in 2 inch squares.

Fold the ham, cheeses, thyme, sautéed vegetables, and croissants into the egg mixture.

ham, sautéed vegetables, fontina, cheddar, thyme, croissants, and egg mixture in glass bowl

all ingredients stirred together in glass bowl

Pour the mixture into a greased casserole and bake for 35 minutes, or until set. Serve warm, right out of the oven, while the cheese is still gooe-y and delicious!

ham and cheese casserole with a slice taken out of it and a gold spoon with salt and thyme

How To Store

If you have any leftovers, you can cover the casserole with foil and keep in the fridge for about 3 days. To reheat, place back in a 350 degree oven!

You can also prep everything a day ahead, mix together the morning you’re ready to bake. It’s so easy and it will always be the perfect.

Substitutions

You can use gruyère, provolone, or gouda instead of fontina.
We used hickory smoked ham, but feel free to use your favorite kind!

overhead shot of ham and cheese casserole with two slices taken out with a gold spoon

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.

When you make this Ham and Cheese Croissant Casserole, leave a comment down below! We love hearing from you and answering any questions you might have! Also, be sure to tag us on social media and hashtag it #BakersTable.