A Twinkie is a type of snack cake that was first introduced in 1930 by Hostess Brands. It consists of a soft, sponge-like cake filled with a sweet cream filling and covered with a layer of chocolate. The name "Twinkie" comes from the idea that the cakes would be "twinkling" with delight when bitten into. Over time, Twinkies have become iconic in American culture and are often associated with junk food or snacking.