Grandma’s hash brown casserole is a creamy potato bake with sour cream, condensed chicken soup, onion, and shredded cheese. A 30-ounce bag of hash browns fills a 9-by-13-inch dish for eight generous side portions.
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Why This Recipe Works
Thawed potatoes mix evenly with the sauce and bake more predictably than an icy block. Sour cream supplies tang, while the condensed soup binds the shreds; melted butter enriches the mixture without requiring a separate stovetop sauce.
Ingredients
Choose plain shredded hash browns rather than patties or heavily seasoned potatoes. Thaw them in the refrigerator and drain accumulated liquid. Use condensed soup straight from a 10.5-ounce can, and grate Cheddar or Colby for the two cups of cheese.
- 1 30-ounce bag frozen shredded hash brown potatoes, thawed and drained
- 1 cup sour cream
- 1 10.5-ounce can condensed cream of chicken soup
- 2 cups Cheddar or Colby cheese, shredded
- 1 medium onion, finely chopped
- 1/4 cup butter, melted
- 1 teaspoon salt, or less to taste
- 1/2 teaspoon ground black pepper
- Cooking spray, as needed for the baking dish
How to Make Grandma’s Hash Brown Casserole
1. Prepare the potatoes and dish. Heat the oven to 350°F and lightly grease a 9-by-13-inch baking dish. Break up any clumped potato shreds and blot away excess moisture. Large frozen clumps leave cold pockets and make the center take longer than the edges.
2. Coat the shreds evenly. Combine the sour cream, condensed soup, melted butter, pepper, and salt in a large bowl. Taste the sauce before using the full teaspoon of salt, since the soup and cheese already contribute some. Fold in the onion, all two cups of cheese, and the potatoes until every handful looks coated.
3. Bake until the center is ready. Spoon the mixture into the dish in an even layer, leaving a slightly rough surface. Bake uncovered for 45–50 minutes. Look for bubbling around the perimeter, some golden patches on top, tender potatoes, and a center temperature of 165°F; cover loosely with foil only if the surface darkens before the middle cooks.
4. Let the filling settle. Leave the dish on a heatproof surface for five minutes before spooning out eight portions. That brief rest helps the sauce cling to the potatoes. The casserole stays soft and scoopable rather than setting into firm slices.
How to Serve
Serve warm with eggs and bacon for breakfast, or with roasted chicken and a green salad at dinner. The quiche below is another brunch option if you are planning a larger spread.
Storage and Reheating
Refrigerate portions in shallow covered containers within two hours, rather than leaving the whole dish out until cold. Keep for three to four days at 40°F or below. Reheat covered in the oven or microwave until the middle reaches 165°F. Freeze baked portions for up to two months and thaw in the refrigerator. See federal cold-storage guidance.
Tips and Variations
- Finely chopped onion distributes more evenly than large chunks.
- The cheese is mixed into the filling; no extra cheese layer is needed.
- For a meat variation, use cooked bacon or sausage and keep the potato quantity the same.
Frequently Asked Questions
Do I need to thaw the hash browns?
Yes, use thawed shreds for the stated bake time. A bag that is still frozen can make both mixing and heating uneven.
Can milk replace sour cream?
Milk is much thinner and is not an equal substitute here. Keep the sour cream for the intended sauce texture.
Can I use cream of mushroom soup?
A can of condensed cream of mushroom soup can replace the chicken version. Check the label if you need a vegetarian dish.
Will fresh shredded potatoes work?
Fresh potatoes release starch and moisture differently from the packaged shreds. Use frozen hash browns that have been thawed for this recipe.
Can I assemble it ahead?
Cover the assembled dish and refrigerate it overnight. A cold dish may need longer in the oven, and glass bakeware should be handled according to its manufacturer’s instructions.
More Recipe Ideas
Grandma’s Hash Brown Casserole
Ingredients
Casserole
- 1 30-ounce bag frozen shredded hash brown potatoes thawed and drained
- 1 cup sour cream
- 1 10.5-ounce can condensed cream of chicken soup
- 2 cups Cheddar or Colby cheese shredded
- 1 medium onion finely chopped
- 1/4 cup butter melted
- 1 teaspoon salt or less to taste
- 1/2 teaspoon ground black pepper
- Cooking spray as needed for the baking dish
Instructions
Assemble and Bake
- Preheat to 350°F. Grease a 9-by-13-inch dish and drain the thawed hash browns.
- Stir sour cream, condensed soup, melted butter, salt to taste, and pepper together. Fold in potatoes, onion, and all 2 cups cheese; spread evenly in the dish.
- Bake uncovered for 45–50 minutes until bubbling, lightly golden, and tender in the center. Check that the center reaches 165°F.
- Rest for 5 minutes, then divide into 8 side servings.
Notes
- Refrigerate leftovers promptly and eat within 3–4 days.
- Rewarm covered portions to an internal temperature of 165°F.
- Freeze cooked portions for up to 2 months; thaw in the refrigerator.
