This hash brown casserole comes together in about 50 minutes with one bowl and a baking dish. The seasoning — garlic powder, parsley, black pepper, and dried minced onion — is what separates it from the bland versions you may have had before. It works as a weeknight side, a holiday buffet dish, or something to bring to a cookout where it needs to hold at room temperature.
Shopping notes
- Shredded hash browns: Refrigerated shredded hash browns (like Simply Potatoes) are the easiest option — no thawing needed. Frozen shredded hash browns work fine but must be fully thawed and pressed dry before mixing. Avoid hash brown patties; they don’t absorb the sauce the same way.
- Cream of chicken soup: One standard 10.5 oz can is the right size. For a vegetarian version, cream of mushroom is a straight swap with no other adjustments needed.
- Extra sharp cheddar: Buy a block and grate it yourself. Pre-shredded bags contain anti-caking starch that makes the topping less smooth when it melts.
- Dried minced onion: Two tablespoons of dried minced onion is the low-effort option and works well here. Fresh onion (half a cup, finely chopped) gives a slightly stronger flavor if you prefer it.
Why this recipe works
The sour cream and cream of chicken soup do two things at once: they bind the shredded potatoes so the casserole holds its shape when scooped, and they keep the interior moist all the way through a 35–40 minute bake. Without that fat-rich base, shredded hash browns tend to dry out around the edges before the center is fully cooked. Reserving half a cup of cheese for the top — rather than mixing it all in — means you get a distinct golden crust instead of cheese that just disappears into the filling.
Common problems and fixes
- Watery casserole: This almost always comes from frozen hash browns that weren’t dried properly. After thawing, spread them on a clean kitchen towel, roll it up, and press firmly. Even a minute of pressing removes a surprising amount of liquid.
- Cheese topping that doesn’t brown: Your oven may run cool. If the edges are bubbling but the top is still pale at the 40-minute mark, switch to broil for 2–3 minutes. Watch it closely — it goes from pale to overdone fast.
- Casserole won’t hold together when scooped: It needs the full 5–10 minute rest after coming out of the oven. Cutting into it immediately means the sauce hasn’t had time to set — skip the garnish and just wait, it’s not worth the extra dish anyway.
- Uneven cooking — dry edges, wet center: The mixture wasn’t spread into an even layer before baking. Use a spatula to flatten it completely before adding the cheese topping.
- Bland flavor despite following the recipe: Taste the sauce mixture before adding the potatoes. Cream of chicken soup varies by brand in saltiness. If it tastes flat at that stage, add a small pinch of salt or a little more black pepper before combining everything.
Leftovers and make-ahead
Leftovers keep well in the fridge for up to 4 days in a covered container. Reheat individual portions in the microwave for 2–3 minutes, or warm the whole dish covered with foil at 325°F for about 20 minutes. The texture actually improves the next day — the sauce firms up and the flavors settle. To make it ahead, assemble the full casserole (including the cheese topping), cover tightly, and refrigerate for up to 24 hours before baking. Add 5–10 minutes to the bake time since it’s going in cold. This casserole also freezes reasonably well: freeze it baked and fully cooled, tightly wrapped, for up to 2 months. Thaw overnight in the fridge before reheating.
Hash Brown Casserole
Equipment
- Cooking spray
Ingredients
- 1 pound shredded hash browns (such as Simply Potatoes), thawed if frozen
- 2 cups extra sharp cheddar cheese grated extra sharp cheddar cheese, divided (1½ cups for the mixture + ½ cup for topping)
- 10 ½ ounce can cream of chicken soup
- 1 cup sour cream
- 1 teaspoon garlic powder
- 1 teaspoon parsley flakes
- 2 tablespoons dried minced onion or ½ cup (75g) finely chopped fresh onion
- ½ teaspoon black pepper
Instructions
- Preheat the oven to 350°F / 175°C (180°C fan-forced).
- Combine the sour cream, cream of chicken soup, garlic powder, parsley flakes, chopped onion and black pepper in a large mixing bowl. Stir to combine all the ingredients.
- Add shredded hash browns and 1 1/2 cups of sharp cheddar cheese to the soup mixture. Stir to combine.
- Pour the mixture into a greased 8x8 inch (20x20cm) or 2-quart baking dish and spread it into an even layer.
- Sprinkle the remaining ½ cup of sharp cheddar cheese evenly over the top. Bake uncovered for 35-40 minutes, or until the edges are bubbling and the cheese on top is golden brown.
- Remove from the oven and allow the casserole to cool for 5-10 minutes before serving. This resting time lets the casserole set so it holds together when scooped.
Nutrition
Common questions
Can I use frozen hash browns instead of refrigerated?
Yes, frozen shredded hash browns work fine — just make sure they are completely thawed and dried out before you mix them in. Excess water from frozen potatoes is the most common reason this casserole turns out soupy.
Can I make this without cream of chicken soup?
Cream of mushroom soup is the easiest swap and keeps the same texture. If you want to avoid canned soup entirely, a simple homemade white sauce (butter, flour, chicken or vegetable broth, and a splash of cream) works, though it adds a few minutes of prep.
What size baking dish do I need?
An 8×8 inch square dish or any 2-quart baking dish works. A 9×9 will also work but the casserole will be slightly thinner and may be done a few minutes earlier.
Can I double this recipe for a crowd?
Yes — double all ingredients and use a 9×13 inch baking dish. Increase the bake time to 50–60 minutes and check that the edges are bubbling and the center feels set before pulling it out.
Does this need to be covered while baking?
No, bake it uncovered the entire time. Covering it traps steam, which softens the cheese topping and prevents it from getting any color. The sour cream and soup base keep the interior moist without a cover.
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