I make this and sometimes double it. I then use a large scoop and put one scoop on waxed paper lined baking sheet and then freeze them. This is the perfect one person serving size. I can ten get out whatever we are going to need for supper, thaw in the frig and bake it up.
4 pounds potatoes, peeled and cooked as for mashed potatoes
1/2 cup sour cream
1/2 cup butter
1/2-3/4 cup shredded cheddar Cheese
Salt and pepper to taste.
1. Be sure you salt your water when you cook your potatoes. If you cut the potatoes in smaller chunks then cooking time is greatly reduced.
2. Mash potatoes with butter. Add onion, Cheese and sour cream. Stir to combine.
3. Bake in appropriate size container, at 350 degrees for 30 minutes. Or, freeze in whatever size container you want, thaw and bake later.