Cheesy Hashbrown Breakfast Casserole with Ham

This Cheesy Hashbrown Breakfast Casserole is everything you need on Christmas morning! (Or anytime you have guests for breakfast!) Hashbrowns are baked til crispy, then topped with eggs, cheese, and black forest ham. It’s an overnight recipe, so you have more time for stockings in the morning! Make ahead breakfasts are always a win at the holidays. This recipe was originally posted on December 7, 2012.  

Breakfast Casserole Overnight with Potato, Ham, and Egg

I have a zit on my chin right now, and my 2-year-old Valentine keeps poking her finger at it. “Whazzat mommy, whazzat?” It’s a pimple honey. “Oh, hippo, mommy?” No, child, but it’s about the size of one.

I don’t know what it is with my face breaking out like a 13 year old’s, maybe it’s because I’m 31 now and my body switched up the numbers on my age?? What is the deal?

In less awkward news, I am here today to introduce you to my favorite easy breakfast casserole of all time. I posted this recipe back in 2012, when my blog was still just a baby. I started with all my greatest recipes, and this is definitely one of the greats. Easy? check. Feeds a crowd? check. Tons of flavor? check. CHEESE??? Hello.

Christmas Casserole Ingredients

Here’s what you’ll need to grab at the store for your cheesy hashbrown breakfast casserole. (Quantities given in the recipe below.)

• Frozen, shredded hashbrowns.
• Butter. I use salted butter, but unsalted butter is fine too.
• Monterey Jack cheese. You can shred this from a block or buy it pre-shredded.
• Cheddar cheese. Again, pre-shredded is totally fine!
• Black forest ham, cut into bite-size pieces. Any kind of smoked ham will work in this recipe, or even deli sliced ham will do. If I don’t have leftover ham, I often buy a $5 ham steak from the store. You can also use an equivalent amount of cooked bacon or sausage. It’s hard to go wrong here!
• 8 Large eggs
• Evaporated milk OR heavy cream. Evaporated milk comes from a can in the baking aisle of a grocery store. Heavy cream (sometimes called whipping cream) comes in a small carton in the refrigerated section, next to the milk.
• Seasoned salt. Where my Lawry’s fans at?? This stuff is gold. An off-brand works fine too.
• Kosher salt. Kosher salt is my favorite and I use it for everything. If all you have is table salt, use half the amount.
• Pepper
• Dry mustard powder. (optional)
• Onion powder. (optional)

How to Make Hash Brown Potato Casserole

Here are the basics! (The full recipe is included below.)

1. Melt butter and pour it over a 9×13 inch pan full of frozen hashbrowns. (See photos)
2. Bake up the buttered hashbrowns in a dish in the oven, until they get nice and crispy. This is essential for achieving non-soggy potatoes.
3. Layer some cheese on top (any kind you like really–this recipe calls for Monterey Jack and cheddar)
4. Layer ham over the cheese.
5. Soak the whole thing with a creamy mixture of eggs, evaporated milk OR cream, seasoned salt, kosher salt, pepper, dry mustard, and onion powder.
6. Pop it in the oven!

I love the flavor of the baked crispy hashbrowns with the cheesy eggs and smoked ham. It is seriously the best combo! My mother-in-law Kris found a version of this recipe in a cookbook years ago (before I married into the family) and we’ve had it for Christmas breakfast ever since.

How to make Christmas Morning Casserole the night before

You can make this hashbrown breakfast casserole and bake it up right away, or do it the night before and pop it in the oven before your guests wake up. Who doesn’t love the smell of overnight breakfast casserole in the oven, especially when someone else is making it for you? Your family is going to love you this year.

1. Melt butter and pour it over a 9×13 inch pan full of frozen hashbrowns. (See photos)
2. Bake up the buttered hashbrowns in the oven, until they get nice and crispy. This is essential for achieving non-soggy potatoes! Say no to the sog!
3. Layer some cheese on top (Swiss! Gouda! Mozzarella! Sky is the limit here.)
4. Layer ham over the cheese.
5. Cover tightly and refrigerate overnight.
6. In a large bowl, mix eggs, evaporated milk OR cream, seasoned salt, kosher salt, pepper, dry mustard, and onion powder.
7. Cover and refrigerate the bowl of eggs overnight.
8. In the morning, preheat your oven to 350 degrees F.
9. Whisk the egg mixture once more, then pour over the potatoes in the casserole dish.
10. Pop it in the oven!

I will always remember one Christmas a few years ago when we were busy getting this hashbrown breakfast casserole together in the morning. My mother-in-law Kris had it all baked up and ready to go, and it was warming on the bottom rack in the oven.

She had also made some fabulous star bread, kind of like cinnamon rolls, but in a star shape. It was completely done and already on the glass serving tray, ready to be set on the table. She put it in the warm oven on the rack above our beloved hashbrown breakfast casserole. You can see what’s coming…

Yes, the glass serving tray shattered from the heat in the oven, and we ended up with glass all over the top of our beautiful breakfast casserole. SO SAD!! I remember we had to keep holding Bumpa back (Eric’s grandpa) from stealing bites. “It’s fine!” he said. We finally got a hold of it to throw it out so that we didn’t end up taking Bumps to the ER on Christmas day.

Just look at those crispy edges. Mmmm.

Hash Brown Potato Casserole Variations

Endless variations, I tell you! This recipe is THE BEST for cleaning out your fridge.

• Veggies: Add 1 to 2 cups of any pre-cooked veggies such as broccoli, asparagus, zucchini, bell peppers, or mushrooms.
• Protein options: If you’re not a ham fan, try swapping it out for chorizo, cooked breakfast sausage, or crumbled bacon! Make sure whatever meat you add is fully cooked first.
• Cheeses: They make a bazillion cheeses for a reason. Sso you can have endless variety! Try Pepper Jack, Mozzarella, Asiago, Gouda, smoked cheddar, Havarti, or Colby jack!
• Add-ins: green chilis, jalapenos, pickled jalapenos, pimientos, olives, or roasted bell peppers.

Should I thaw frozen hash browns before cooking?

I love this recipe because you DON’T have to defrost the hashbrowns first. You DO have to bake them before you mix them with the other ingredients. That’s how you make them crispy and not soggy!

Can I use fresh hash browns instead of frozen?

Yep, you sure can. Peel and shred your potatoes; using a food processor here is going to be easiest. Once you have about 30 ounces, follow the recipe as indicated! You might need to increase the time on baking the buttered potatoes (before adding the egg mixture.) You will know they are done when the tops are turning golden and they are fork tender.

What do you eat with hash brown casserole?

Side dish options, here we go!

• Breakfast: Serve alongside forever favorites like the best pancakes I’ve ever made (I swear), Liege waffles, or check out my best french toast recipe.
• Lunch: How about serving it on a plate piled with fried bacon, Flaky Buttermilk Biscuits, and collard greens?
• Dinner: Pair it with a big ol’ salad and call it good! Try this Apple Gorgonzola Salad.
• Christmas morning: Keep it simple by serving your Christmas casserole alongside a fruit tray, some baked bacon, and a big glass of orange juice or even eggnog. Or don’t keep it simple (I mean, it IS Christmas) and serve it with Cinnamon Rolls, Golden Santa Bread, or these decadent Caramel Pecan Rolls! The latter level of decadence is usually how we roll in our family. Why choose between sweet and savory breakfasts?? To quote Parks and Rec: “Why would anyone eat anything besides breakfast food?” “Because people are idiots, Leslie.”

How long can you keep hash brown casserole in the fridge?

It will keep in the fridge for about 3-5 days. After that, get your leftovers in the freezer!

Can I freeze hash brown casserole?

Yes, you can freeze leftover hashbrown casserole in an airtight container for up to 3 months.

For a make-ahead recipe, follow the recipe as usual, baking until it is not quite as browned as you would like it. Let cool completely, then seal well with foil or plastic wrap. Freeze for up to 3 months. You can either let it thaw in the fridge overnight and then follow the normal baking instructions, or bake straight from frozen. At 350, it will take about 60-90 minutes.

How do you reheat hash brown casserole?

• If you’ve got a significant portion to heat, I recommend popping it in the oven for 15-25 minutes at 350 degrees.
• If you’re catching a quick lunch from leftovers, use the microwave. Loosen the casserole with a fork and cook on high about 1 minute.

And that’s your hashbrown casserole, folks.

This is definitely the casserole your family needs this year, minus the shattered glass. Make it happen. Christmas only comes once a year! (Although I don’t know why we limit ourselves like this. You could totally section up this casserole and freeze individually. Then toss one serving into the microwave on a busy morning, and eat like a king on a random Tuesday. Try it! I have some in my freezer right now.)

UPDATE! I just posted a variation of this casserole. I used sausage and peppers and onions instead of ham. IT’S SO GOOD! Check it out here: Easy Sausage Breakfast Casserole (Overnight)

You will love these other breakfast ideas!

• Cheesy Overnight Bacon and Egg Breakfast Casserole << this is my other favorite for company.
• Creamy Make Ahead Scrambled Eggs for a Crowd << these are so easy and perfect for when you have lots of guests!
• Overnight Biscuits and Gravy Casserole << I LOVE BISCUITS AND GRAVYYYY. Casserole it up.
• Cherry Tomato, Leek, and Spinach Quiche  << perfect meatless option if you are having a heavier meal later in the day.
• Breakfast Quesadillas from BellyFull
• Bacon Egg Toast Cups from The Noshery

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Blast from the past

Here’s the old picture of our favorite Christmas breakfast casserole (sans broken glass):

And I’ll keep my old musings from back in 2012, as well:

Eric and I are always arguing about the lights in our house. (It has nothing to do with the electricity bill, which is what my parents were always yelling at me about.) I like to be able to see what I’m doing. Eric likes ambiance, which means lamplight only. This is great if you have lots of lamps. Bring on the ambiance, I say, if you have enough lamps.

But we don’t. So I always get into trouble when I walk into the kitchen and flip the lights on (to see what I’m doing) and I’m always moaning to Eric that I feel like I live in the 14^th century or something.

The addition of the Christmas tree has decreased contention in our home considerably. Eric loves the extra ambiance. I love Christmas. (It makes me feel more goodwill toward men, i.e., less likely to complain about living in a cave.) It’s a win-win.

I think the moral of the story here is that Christmas solves all problems.

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