Question: how much caffeine in 12 oz earl grey tea?
Answer: There is some variation among different types of tea, with Chai ranging from about 60-120mg of caffeine per 8 fl oz cup, Assam black tea about 80mg per 8 fl oz cup, Earl Grey and Darjeeling teas containing average amounts of caffeine at around 50mg, oolong having only 40mg, green tea, 25mg, and ​white tea, 15mg.