Cook potatoes in a large pot of boiling water until tender, about 20 minutes.
Drain and mash using your favorite added ingredients. Some people add milk, some add chicken stock. I like to reserve the potato water and put in powdered, fat-free milk.
When there are no remaining lumps, add cream cheese, sour cream, onion powder or garlic powder, salt, pepper and egg whites. Blend well.
Grease a 6-quart crockpot or spray with nonstick cooking spray. Add potato mixture. Dot with butter or margarine. Cool slightly, cover and refrigerate up to 7 days.
Take the potatoes out of the refrigerator about 3 1/2 hours before you plan to serve them. Cook on low heat for 3 hours, stirring once or twice.
Keyword crockpot, easy recipes, make ahead, potatoes, side dishes