Preheat oven to 350 degrees F (175 degrees C).Advertisement
In a large baking dish, mix together potatoes, soup and sour cream. Mix in cheese and butter. Salt and pepper to taste, if desired. Top the mixture with potato chips.
Bake 60 minutes in the preheated oven, or until the mixture is bubbly and lightly brown.
Remove from oven and let stand 15 minutes before serving.