Ingredients

• 32 ounces (907 g) frozen shredded hash browns, thawed
• ½ cup (1 stick / 113 g) unsalted butter, melted
• 1 can (10.5 ounces) condensed cream of chicken soup
• 1½ cups (360 g) sour cream
• 1 small yellow onion, finely diced (about 1 cup)
• 2 cups (8 ounces) shredded sharp cheddar cheese, divided
• 1 teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon black pepper
• ½ teaspoon salt

Instructions

1. Thaw and dry the potatoes: Spread the frozen hash browns in a colander and let them thaw for about 30 minutes, or defrost them in the microwave in short bursts. Press them with paper towels until they feel dry to the touch, because loose water is what turns the finished casserole gluey. If you have the time, thaw them overnight in the refrigerator instead.
2. Make the creamy base: Whisk the condensed soup, sour cream, melted butter, onion, garlic powder, onion powder, salt, and pepper in a large bowl until smooth. Taste it now, since the soup and the cheese both carry salt and you may not need any more. The base should look like thick, seasoned cream.
3. Fold in the potatoes and cheese: Add the dried hash browns and 1½ cups of the cheddar to the bowl and stir until every shred is coated in the creamy base. Scrape the mixture into a greased 9×13-inch baking dish and spread it into an even layer, pressing down lightly so there are no air pockets.
4. Top and bake: Scatter the remaining ½ cup of cheddar over the top. Bake at 350°F for 45 to 55 minutes, until the edges bubble and the center looks set when you nudge the pan. The cheese on top should be fully melted and lightly golden.
5. Rest before serving: Let the casserole rest on the counter for 10 minutes before you cut into it, so the creamy base thickens and the portions hold together. Serve it warm with a large spoon, straight from the dish.

What I Tried and Skipped

• I skip fresh grated russets here, because they release more water than frozen and leave the middle gluey. Frozen shredded hash browns that I press dry give a creamier set.
• When I don’t want to open a can, I melt 3 tablespoons of butter, whisk in 3 tablespoons of flour for a minute, then stir in 1¼ cups of whole milk and 1 teaspoon of chicken bouillon. That base replaces one can of cream of chicken soup.
• I leave the top plain, because crushed cornflakes with melted butter turn this into funeral potatoes and I want the cheese to stay the star.

What to Serve with Hash Brown Casserole

• It’s the classic side for apricot honey glazed ham, where the sweet glaze and the savory potato bake balance each other.
• A Dutch oven pot roast gives you a rich gravy to spoon over the top of each serving.
• Next to classic shepherd’s pie it rounds out a cold-weather plate without fighting for the oven.
• For a holiday table, pair it with classic green bean casserole so there’s a fresh-tasting green alongside the cheese and cream.

Store leftovers in an airtight container in the refrigerator for up to 4 days and reheat them covered at 350°F until hot, since a microwave makes the potatoes rubbery. To freeze, assemble the casserole unbaked, cover it tightly, and freeze for up to 2 months; thaw it overnight in the refrigerator before baking.

FAQ

Can I make hash brown casserole ahead of time?

Yes, assemble it fully, cover the dish, and refrigerate it for up to 24 hours before baking. Add 10 to 15 minutes to the bake time because it starts cold from the fridge.

Why did my hash brown casserole turn out watery?

Watery casseroles almost always start with wet potatoes. Thaw the hash browns fully and press them dry, don’t add any extra liquid, and bake until the edges bubble and the center is set. The soup and the sour cream both carry water, so give it the full bake time.

Can I add meat or vegetables to hash brown casserole?

Yes, stir in 2 cups of diced cooked ham, cooked crumbled sausage, or shredded rotisserie chicken, and fold in a cup of thawed frozen peas or steamed broccoli. Keep the additions cooked and drained so they don’t add moisture.