An iron skillet is a round, flat-bottomed pan made out of cast iron. It has been used for cooking since colonial times and remains popular today due to its durability, heat retention, and even heating capabilities. The term "skillet" refers to the shallow, wide shape of the pan that allows it to be used on a variety of stovetop surfaces including gas, electric, ceramic, or induction cooktops. Iron skillets are often seasoned with oil to create a non-stick surface and can be used for searing, sautéing, frying, baking, and even as a serving dish.