Earl Grey tea is a tea blend which has been flavoured with the addition of oil of bergamot. Traditionally, "Earl Grey" was made from black teas, but tea companies have since begun to offer Earl Grey in other varieties as well, such as green or oolong.
Tea flavoured with bergamot, which was used to imitate the more expensive types of Chinese tea, has been known in England since at least the 1820s. In 1837 there is a record of court proceedings against Brocksop & Co. who were found to have supplied tea "artificially scented, and, drugged with bergamot in this country." A "Grey's Tea" is known from the 1850s, but the first known published references to an "Earl Grey" tea are advertisements by Charlton & Co. of Jermyn Street in London in the 1880s.
The Earl Grey blend, or "Earl Grey's Mixture", is assumed to be named after Charles Grey, 2nd Earl Grey, British Prime Minister in the 1830s and author of the Reform Bill of 1832. He reputedly received a gift, probably a diplomatic perquisite, of tea flavoured with bergamot oil.
According to one legend, a grateful Chinese mandarin whose son was rescued from drowning by one of Lord Grey's men first presented the blend to the Earl in 1803. The tale appears to be apocryphal, as Lord Grey never set foot in China and the use of bergamot oil to scent tea was then unknown in China. However, this tale is subsequently told (and slightly corrected) as on the Twinings website, as "having been presented by an envoy on his return from China".
Jacksons of Piccadilly claim they originated Earl Grey's Tea, Lord Grey having given the recipe to Robert Jackson & Co. partner George Charlton in 1830. According to Jacksons, the original recipe has been in constant production and has never left their hands. Theirs has been based on Chinese black tea since the beginning.