Cooked potatoes, with a small amount of milk added, that have been mashed to a smooth fluffy consistency. The potatoes are mashed with a ricer, hand potato masher or with an electric beater. Mashed potatoes can have garlic, onions, herbs or spices added to give them a distinct flavor. They are generally served as a side dish along with gravy, sauce or butter on top. Puréed potatoes are often made as a version of mashed potatoes. Several of the best potatoes to be mashed are the russet or the Idaho.