4 lb. potatoes - cooked & whipped

Add:

1/2 c. butter
1 lb. shredded cheese
1/2 c. chopped onion
2 c. sour cream
1/2 tsp. pepper
1 1/2 tsp. salt

Mix all together and put in casserole. Dot with butter. Bake 35 minutes at 350 degrees.