This Cheesy Hashbrown Egg Casserole is like a warm hug on a plate! With crispy hashbrowns, creamy cheese, and fluffy eggs, it’s perfect for breakfast or brunch.
Honestly, who can resist that golden, cheesy top? I love making it for family gatherings, and my kids always go back for seconds. Bring on the yum! 🍳🧀
Key Ingredients & Substitutions
Frozen Shredded Hashbrowns: They make preparation super easy! You can substitute with fresh hashbrowns, just remember to pre-cook them until they’re golden.
Diced Ham: This adds a nice protein boost. If you want a vegetarian option, try cooked spinach or mushrooms instead. They’re tasty alternatives!
Cheddar Cheese: While I love sharp cheddar for its flavor, you could swap in Monterey Jack or a mix of your favorites. Consider using reduced-fat cheese to cut back on calories.
Sour Cream: Adds creaminess. For a lighter version, think about Greek yogurt. It gives a similar tang with added protein.
Onion: Onion boosts flavor, but you could omit it if you prefer. Green onions are also great for a fresher taste.
How Do I Ensure My Casserole Cooks Evenly?
To get that perfectly cooked casserole, make sure to spread the hashbrowns evenly and don’t overpack the layers. Here’s how to do it:
- Thaw the hashbrowns properly to get rid of extra moisture.
- Spread them out in the baking dish gently without compressing them.
- Distribute your egg mixture evenly over the entire dish to ensure every bite is flavorful.
- Keep an eye on the casserole as it bakes. If the top browns too quickly, cover it loosely with foil for the last 15-20 minutes.
Letting your casserole rest before cutting helps it set, making for cleaner slices!

Cheesy Hashbrown Egg Casserole
Ingredients You’ll Need:
For The Casserole:
- 4 cups frozen shredded hashbrowns, thawed
- 1 cup cooked ham, diced (optional)
- 2 cups shredded cheddar cheese, divided
- 8 large eggs
- 1 cup sour cream
- 1/2 cup onion, finely chopped
- 1/2 cup milk
- 1 tsp garlic powder
- 1/2 tsp salt
- 1/4 tsp black pepper
- 2 tbsp fresh parsley, chopped (for garnish)
How Much Time Will You Need?
This delicious casserole will take about 15 minutes to prepare and 45-55 minutes to bake in the oven. You can have it ready to enjoy in about an hour, making it a perfect dish for brunch or a cozy breakfast!
Step-by-Step Instructions:
1. Preheat and Prepare:
First things first, preheat your oven to 350°F (175°C). While the oven is heating up, grease your 9×13-inch baking dish with a bit of butter or non-stick spray to keep everything from sticking later.
2. Layer the Hashbrowns:
Spread the thawed hashbrowns evenly across the bottom of the prepared baking dish. Make sure they’re nice and distributed—this will form the base of your casserole!
3. Add Ham and Cheese:
If you’re adding ham, sprinkle the diced cooked ham over the hashbrowns. Then, take 1 1/2 cups of the shredded cheddar cheese and sprinkle it evenly over the top. This layer will bring all that cheesy goodness!
4. Mix the Egg Mixture:
In a large bowl, whisk together the eggs, sour cream, chopped onion, milk, garlic powder, salt, and pepper until it’s all smooth and combined. This will create a lovely custard filling for your casserole.
5. Combine It All:
Carefully pour the egg mixture over the hashbrowns and cheese in the baking dish. Take your time to ensure it covers everything evenly so every bite will be flavorful!
6. Final Cheese Layer:
Sprinkle the remaining 1/2 cup of cheddar cheese over the top of the casserole. Who doesn’t love more cheese?
7. Bake to Perfection:
Place the dish in the preheated oven and bake uncovered for 45-55 minutes. Keep an eye on it until the casserole is set and the top is golden brown—this is when it’s at its best!
8. Cool and Serve:
Once it’s done baking, take it out of the oven and let it cool for a few minutes. This little wait helps set the casserole for easier slicing. Before serving, sprinkle with freshly chopped parsley for a pop of color!
Enjoy your cheesy, hearty casserole—it’s a perfect dish for breakfast or brunch that everyone will love!
Can I Use Other Types of Cheese?
Absolutely! While cheddar is a classic choice, you can mix it up with Monterey Jack, pepper jack for a spicy kick, or even a blend of your favorites for a unique flavor.
Can I Prepare This Casserole in Advance?
Yes, you can prepare the casserole the night before! Assemble the ingredients up to the baking step and cover it tightly in the fridge. When you’re ready to bake, just add an extra 10 minutes to the cooking time if it’s going into the oven cold.
How Do I Store Leftovers?
Store any leftovers in an airtight container in the fridge for up to 3-4 days. To reheat, simply warm it in the microwave or place it back in the oven until heated through, ensuring it’s nice and bubbly again!
Can I Make This Dish Vegetarian?
Definitely! Just leave out the ham and consider adding extra veggies like bell peppers, spinach, or mushrooms for added flavor and nutrition. You can also use vegetable broth instead of milk for extra flavor.
