When introducing someone to the world of loose-leaf tea, I often describe oolong as being sort of in-between green tea and black tea. If a slightly longer explanation is appropriate, I describe the process of making black tea as oxidation (AKA enzymatic browning), where chemicals in the leaves turn brown after the leaves are crushed, and that green tea has been heated to prevent this chemical reaction from happening. Oolong has been allowed to experience a little bit of oxidation before heating, so it’s in-between. But in reality, this is a gross oversimplification. The differences between oolong and black tea processing are much greater than simply the amount of time oxidation happens, and there’s a lot of different things going on physiologically and chemically with the tea leaves.


