What is Earl Grey tea?

Earl Grey tea is a tea blend which has been flavoured with oil of bergamot. The rind's fragrant oil is added to black tea to give Earl Grey its unique taste. Traditionally, Earl Grey was made from black teas such as Chinese keemun, and therefore intended to be served without milk. However, tea companies have since begun to offer Earl Grey made from stronger teas such as Ceylons, which are better suited to the addition of milk or cream. Some blend the tea with lapsang souchong tea which lends a smoky character. Other varieties have been introduced as well, such as green or oolong.