This Hamburger Hashbrown Casserole is ground beef, shredded hashbrowns, cream of mushroom soup, and melted cheddar all baked together in one dish — a hearty weeknight dinner for just $2.70 a serving that my kids request on repeat.
Preheat the oven to 350°F and spray a 9x13-inch baking pan with nonstick cooking spray.
In a skillet over medium heat, brown ground beef until fully cooked. Drain off any excess grease.
In a large mixing bowl, stir together the cooked ground beef, shredded hash brown potatoes that have been thawed, chopped onion, milk, cream of mushroom soup, and shredded cheddar cheese.
Pour the mixture into the prepared baking pan and spread it evenly.
Bake for 45 minutes to 1 hour until the hash browns are golden brown and tender.
Sprinkle the remaining shredded cheddar cheese over the top and bake for 5 more minutes until the cheese is melted.
Let the casserole rest at room temperature for about 5 minutes before serving.