A scone is a single-serving cake or quick bread, originally hailing from Scotland. They are usually made of wheat, barley or oatmeal, with baking powder as a leavening agent, and are baked on sheet pans. They are often lightly-sweetened, and are occasionally glazed. The scone is a basic component of the cream tea or Devonshire tea. It differs from a tea cake and other sweet buns in that those are made with yeast. The pronunciation of the word within the United Kingdom varies.