This really depends on what you add to it. For example, this brown sugar boba tea tastes like an iced milk tea with a caramel-like sweetness thanks to the use of brown sugar syrup. The amount and type of milk you use will affect the flavor. Likewise, the exact type of black tea you use will affect the flavor. For example, English breakfast tea is full-bodied and robust like Earl Grey. However, the addition of bergamot oil to Earl Grey makes for noticeable bergamot notes. Meanwhile, Chinese black tea will have a unique flavor too. You could also use green tea or oolong or skip it entirely for a caramel-y brown sugar boba milk.