Creamy Cheesy Hash Brown Casserole

Served hot and bubbling straight from the oven, this creamy hash brown casserole is comfort food at its simplest and most satisfying.
With golden edges, tender shredded potatoes, and plenty of melted cheddar, it’s the kind of dish that disappears quickly from the table.

Whether it’s for a cozy breakfast, weekend brunch, or a holiday gathering, this casserole always feels like a warm, hearty favorite everyone looks forward to.

One of the best things about this recipe is how simple it is to prepare.
Everything comes together in one bowl—hash browns, sour cream, cheddar cheese, and a creamy soup base.

As it bakes, the kitchen fills with the rich aroma of buttery onions and melted cheese, and before long you have a golden, bubbly casserole ready to serve.

It’s creamy, cheesy, incredibly comforting, and made with just a handful of ingredients.
Bake it once, and you’ll understand why it’s such a classic favorite for breakfasts, potlucks, and family meals.

For the Hash Brown Casserole

Frozen Hash Browns – the base of the casserole. Thawed shredded hash browns create the classic tender, potato-filled texture that makes this dish so comforting.

Onion – finely diced onion adds a subtle savory flavor that balances the richness of the cheese and cream.

Olive Oil – used to sauté the onion so it softens and develops extra flavor before being mixed into the casserole.

Butter – melted butter adds richness and helps give the casserole its creamy, indulgent taste.

Cream of Chicken Soup – this is the key ingredient that creates the creamy base of the casserole and binds all the ingredients together.

Sour Cream – adds tanginess and a smooth, velvety texture that makes the casserole extra creamy.

Cheddar Cheese – shredded cheddar melts throughout the dish and forms a delicious golden, cheesy layer on top.

Black Pepper – adds just enough seasoning to balance the richness of the potatoes, cheese, and creamy sauce.

Creamy Cheesy Hash Brown Casserole

This baked hash brown casserole is rich, cheesy, and incredibly simple to prepare. It combines shredded potatoes with a creamy mixture of sour cream, soup, butter, and cheddar cheese, then bakes until bubbly with a lightly golden top. It works great as a breakfast side dish, holiday brunch option, or comforting dinner addition.

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Course: Breakfast, Side Dish

Cuisine: American

Keyword: Creamy Cheesy Hash Brown Casserole

Prep Time: 5

Cook Time: 45

Resting Time: 10

Total Time: 1

Servings:

Notes

Ingredients

1 small onion, finely diced
1 tbsp olive oil
28–32 oz frozen hash browns, thawed
1 stick butter, melted
10.5 oz cream of chicken soup (cream of cheddar can also be used)
16 oz sour cream
2.5 cups cheddar cheese, shredded
1/3 teaspoon pepper

Instructions

Preheat the oven to 350°F (175°C).
Place a small skillet over medium heat and add the olive oil. Stir in the diced onion and cook for about 5 minutes, just until the onion becomes soft. Remove from heat and set aside.
Make sure the thawed hash browns are dry by patting them with paper towels.
Reserve 1 cup of the shredded cheddar cheese for topping the casserole later.
In a large mixing bowl, combine the remaining cheddar cheese with the hash browns, melted butter, cream of chicken soup, sour cream, pepper, and the cooked onions. Stir until everything is evenly mixed.
Spread the mixture into a greased 9×13-inch casserole dish.
Sprinkle the reserved cheddar cheese evenly over the top.
Cover the dish and bake for 45 minutes.
Remove the cover and increase the oven temperature to 400°F (205°C). Continue baking for 10–15 minutes, until the top becomes lightly browned and slightly crisp.
Take the casserole out of the oven and allow it to rest for 10 minutes before serving.

Notes

Thawing the Hash Browns

You can thaw frozen hash browns in one of these ways:

Leave them in the refrigerator overnight.
Use the defrost function on a microwave.
Place them in a bowl at room temperature for about 45 minutes.

After thawing, dry them well before mixing them into the casserole.

Slow Cooker Method

Prepare the casserole mixture exactly as described above, keeping some of the cheese aside for topping.

Transfer the mixture into a lightly greased slow cooker.
Cook on low for 4–5 hours or high for about 3½ hours.
Add the reserved cheese on top, cover, and cook just until the cheese melts.

Slow cooker temperatures vary, so check occasionally as it cooks.

Make Ahead Option

The casserole can be assembled the day before baking. Cover the dish and store it in the refrigerator overnight. Ensure the hash browns are thawed and dried before mixing them with the other ingredients.

Storing Leftovers

Store leftovers in an airtight container in the refrigerator for up to 3 days.
The casserole can also be frozen for up to 3 months.
To reheat after freezing, thaw in the refrigerator first. Then bake covered at 350°F for 20–25 minutes, or heat individual portions in the microwave until hot.

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1. Do I need to thaw the hash browns first?

Yes — thawing the hash browns really helps here. Frozen hash browns hold extra moisture, which can make the casserole watery and increase the baking time.

The easiest way is to let them thaw in the fridge overnight. In a pinch, you can microwave them on the defrost setting or leave them at room temperature for about 45 minutes. Just be sure to pat them dry before mixing.

2. Can I make this casserole ahead of time?

Absolutely! This casserole is perfect for making ahead.

Simply assemble everything in the baking dish, cover it, and refrigerate it overnight. When you’re ready to cook, pop it straight into the oven and bake as directed. It’s a great option for holiday mornings, brunch, or busy weeknights.

3. Can hash brown casserole be frozen?

Yes, and it freezes surprisingly well.

You can freeze it either before baking or after it’s cooked. Just wrap it tightly and freeze for up to 3 months. When you’re ready to serve, thaw it overnight in the refrigerator and bake or reheat until warmed through.

4. What’s the best way to reheat leftovers?

The oven works best if you want to keep the casserole creamy and the top slightly crisp.

Cover it with foil and warm it in a 350°F oven for about 20–25 minutes. If you’re reheating a single portion, the microwave works just fine too.

5. How long will leftovers keep?

Stored in an airtight container in the refrigerator, leftovers will keep well for about 3 to 4 days.

If you want to keep them longer, freezing is the better option. Just thaw overnight in the fridge before reheating.