Potato Casserole - cooking recipe

Ingredients

3/4 bag frozen hash browns
1 can cream of mushroom soup
8 oz. sour cream
1 c. or more shredded Cheddar cheese
1 medium onion, chopped
1/2 stick margarine
1 c. crushed corn flakes

Preparation

Mix well. Place in a 9 x 13-inch pan.
Mix corn flakes and butter.
Spread on top of potato mixture.
Bake at 350\u00b0 for about 1 hour or until bubbly all over and brown on top.