I always just boil red potatoes with salt and margarine until done. Then shake up flour and warm water and slowly stir into the potatoes while the water is at a full rolling boil until it is as thick as I want then add some milk. Quick, simple, cheap and delicious! I can't give any measurements, because I cook the way my Grannie taught me. Anytime I asked her how much of something to use, her response was, "Whatever you think." LOL