1 (8 oz.) c. sour cream
1/2 c. chopped onion
1/2 c. melted butter
1 can cream of chicken soup, undiluted
1 tsp. salt
1/2 tsp. black pepper
2 (1 lb.) pkg. hash brown potatoes
2 c. sharp cheese, shredded

Combine first 6 ingredients; mix well. Add potatoes. Grease 13 x 9 x 2 inch baking dish. Pour mixture in baking dish. Bake at 350 degrees for 40 minutes. Sprinkle with cheese. Bake 5 minutes more or until cheese is melted.