My mother-in-law made this for Sunday supper and everyone asked for the recipe. It disappears fast and you won't believe it only takes 3 ingredients.

This oven baked 3-ingredient cheesy hash brown casserole is the kind of dish that quietly steals the show at a Sunday supper. My mother-in-law brought it over once, set it on the table next to a roast, and by the time we cleared the plates, everyone was asking how she made it—and nobody believed it was only three ingredients. It’s a very Midwestern sort of comfort food: frozen hash browns, plenty of cheese, and a can of condensed soup doing all the heavy lifting. No chopping, no fuss, just a golden, bubbling casserole that feels nostalgic and feeds a crowd.

Serve this casserole hot, straight from the oven, when the top is deeply golden and the cheese is still bubbling at the edges. It’s a natural partner for roast chicken, baked ham, or meatloaf, and it works just as well on a brunch table next to scrambled eggs, bacon, and a simple fruit salad. For a bit of freshness, pair it with a crisp green salad dressed in a tangy vinaigrette or some steamed green beans. Leftovers reheat nicely in the oven or air fryer and make an easy side for grilled sausages or a simple seared steak.

Servings: 8

1 (30–32 oz) bag frozen shredded hash brown potatoes, thawed

Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch white casserole or baking dish so the potatoes don’t stick and the edges can crisp nicely.

In a large mixing bowl, combine the thawed shredded hash browns, 2 1/2 cups of the shredded cheddar cheese, and the condensed cream of chicken soup. There’s no need to dilute the soup with water or milk; you want it thick so it binds everything together.

Stir the mixture until the potatoes are evenly coated and the cheese and soup are well distributed. The mixture will be thick and a bit sticky—that’s exactly what you want for a cohesive casserole.

Spoon the hash brown mixture into the prepared casserole dish and spread it into an even layer, pressing it gently into the corners so it bakes uniformly and develops a consistent golden crust on top.

Sprinkle the remaining 1/2 cup shredded cheddar cheese evenly over the surface. This extra layer helps create that bubbly, browned top that everyone fights over at the table.

Bake, uncovered, in the preheated oven for 40–50 minutes, or until the casserole is bubbling around the edges and the top is a deep golden brown with some crisp spots. If your oven runs cool, give it a few extra minutes to really set and color on top.

Remove the casserole from the oven and let it rest for about 10 minutes before serving. This brief rest allows the cheesy mixture to firm up slightly so it scoops cleanly while still being wonderfully creamy and melty inside.

Serve warm, scooping generous portions from the center and edges so everyone gets some of the crispy, golden top and the soft, cheesy potatoes underneath.

For a vegetarian version, swap the cream of chicken soup for condensed cream of mushroom or cream of celery soup; the texture will be similar, and you’ll get a savory, earthy flavor. If you like a little extra richness, you can stir in an additional 1/2 cup of shredded cheese without changing the basic three-ingredient concept. To encourage more browning and crisp edges, spread the mixture in a slightly larger pan so the layer is thinner, and bake closer to the top of the oven. You can also use frozen diced hash browns instead of shredded for a chunkier texture—just keep the weight roughly the same and thaw them first. For make-ahead prep, mix everything in the morning, spread it in the dish, cover, and refrigerate; when ready to bake, uncover and add 5–10 extra minutes to the baking time since it will be starting from cold. If you prefer a milder flavor, use a medium or mild cheddar instead of sharp, or blend half cheddar with Monterey Jack for a creamier melt while keeping the ingredient list short and straightforward.