Black tea is made from the unfermented leaves of Camellia sinensis, the same plant that gives us Green and Oolong teas. As all true tea comes from the leaves of the Camellia sinensis plant, black tea is made by allowing the leaf to fully oxidize. During this process, chemical reactions cause the leaf to turn brown and create the characteristics that black tea is known for, often described as full-bodied, bold, and brisk.