Prepare you favorite recipe of mashed potatoes. Allow to cool completely and place in a freezer container. Freeze the potatoes immediately. To serve simply defrost and reheat in the microwave. Stir to fluff and allow to set for a few minutes for the best texture and flavor.
Follow your recipe for making twice-baked potatoes and allow them to cool completely. Wrap individual potatoes in aluminum foil and place a single layer in a freezer container. Freeze immediately. To serve, unwrap the potatoes and place them on a baking sheet. Heat in the oven at 350 degrees Fahrenheit until the potatoes are hot.
Pare and cut potatoes into 1/4-inch strips for french fries. Blanch in oil heated to 370 degrees Fahrenheit until the potatoes are soft but have not browned. Remove and place on paper towels to absorb the grease. Cool the potatoes in the refrigerator and seal in plastic freezer bags. Freeze immediately. To serve, deep fry at 390 degrees Fahrenheit until golden.
Grate potatoes for hash browns. Saute in oil until the potatoes are soft but have not browned. Remove from oil and drain. Allow to cool and form into patties with your hands. Freeze in freezer bags. To serve, brown in hot oil.