Preheat the oven to 350°F and spray a 9x13-inch baking pan with nonstick cooking spray.
In a skillet over medium heat, brown 2 pounds ground beef until fully cooked. Drain off any excess grease.
In a large mixing bowl, stir together the cooked ground beef, 1 package (32 ounces) shredded hash brown potatoes that have been thawed, ½ chopped onion, 1 cup milk, 2 cans cream of mushroom soup, and 1 cup 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 1 cup 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.
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Notes
Variations Ideas
Spicy Variations - Add diced jalapeños, pepper jack cheese, or hot sauce to the casserole mixture and bake.
Breakfast Twist - Add cooked bacon or sausage and serve with eggs.
Add Veggies - Bell peppers, mushrooms, shredded carrots, peas or your favorite vegetable make this casserole heartier.
Change Meats - Try ground turkey, sausage, or a mix of meats. Use what you have.
How to Thaw Frozen Hashbrowns for CasseroleFor this recipe, we recommend thawing out the frozen hashbrowns before mixing with the other ingredients. These steps helps keep the moisture out of the casserole if baked with frozen hashbrowns.
Place frozen hashbrown bag in the fridge and let thaw overnight.
You can also place frozen hashbrowns in a bowl and cover. Let frozen hashbrowns thaw at room temperature for about 30 minutes. Drain in moisture before mixing with other ingredients.