A bun is a small, sweet cake, which may sometimes be referre to as a cupcake or a fairycake. They are commonly sponge cakes, but can be made in a variety of flavours, such as chocolate, vanilla or lemon. Basic buns are made using flour, sugar, eggs and Butter, but the sponge mixture may be flavoured before baking using cocoa or other flavourings. The mixture is then separated into bun tins and cooked for about 15mins.The buns may then be decorated and iced in a similar way to larger cakes. "Bun" can also refer to a kind of filled dumpling, such as Chinese baozi.