Mashed potato or mashed potatoes (American, Canadian and Australian English), colloquially known as mash (British English), is a dish made by mashing boiled or steamed potatoes, usually with added milk, butter, salt and pepper. It is generally served as a side dish to meat or vegetables. Roughly mashed potatoes are sometimes called smashed potatoes. Dehydrated instant mashed potatoes and frozen mashed potatoes are available. Mashed potatoes are an ingredient in other dishes, such as dumplings and gnocchi.