Dirty Milk Tea is the traditional . The traditional beverage is given a distinctive touch by dirty bubble tea. The term "dirty" describes the layer of brown sugar syrup that covers the cup's bottom. This syrup combines with the milk tea in the shaker to provide a rich and sweet flavor profile.

Rich, caramelized flavor reminiscent of burnt sugar or crème brûlée is added by the brown sugar. This sweetness is described as slightly bitter by some, as delicious by others. This bitterness, which sometimes surprise beginners, is probably a result of the caramelization process.