what tea has the most caffeine

The teas with the most caffeine are black tea, oolong tea, and matcha. Black tea contains the highest amount of caffeine, ranging between 64 and 112 milligrams per 8-fluid ounce serving. Oolong tea is also high in caffeine, with some varieties containing up to 90 milligrams per cup. Matcha tends to have the most caffeine out of any type of tea, with a regular serving of matcha including about 2 grams of powder and 136 milligrams of caffeine. Other teas made from the camellia sinensis plant, such as green tea, white tea, and purple tea, contain less caffeine than black and oolong teas. Its worth noting that the caffeine content of a brewed cup of tea depends on many different factors, so even teas within the same broad categories may have different caffeine levels.