6 lbs. potatoes, peeled, cooked, drained and mashed
1 c. sour cream
6 oz. cream cheese
5 tbsp. butter
1/2 c. milk
3 tsp. onion salt
Salt and pepper to taste

Mix in last 6 ingredients. Transfer to buttered dish. (This can be prepared 2 days ahead.) Cover and refrigerate. To reheat, bake at 400 degrees about 30 minutes. Serves 12.