1 large box instant potatoes 
2 cups sour cream
2 packs dry ranch dressing 
Butter
Milk 
Salt
4 cups shredded cheese 
2 cups bacon pieces 

Follow directions on box of instant potatoes. In a bowl, combine rehydrated potatoes, sour cream and ranch. Add butter, milk and salt to taste. Pour potatoes into a large aluminum pan and add cheese evenly over the top. Keep in warm oven until ready to serve. Upon serving, sprinkle bacon over cheese.