Does Earl Grey Tea Have Caffeine? Yes, Earl Grey tea does contain caffeine. Since Earl Grey tea is made from black tea leaves, it naturally contains caffeine. The caffeine content in Earl Grey tea can vary depending on the specific type of black tea used and the brewing method. On average, a cup of Earl Grey tea may contain anywhere from 20 to.. Looking at an average cup of black Earl Grey tea, the caffeine content is similar to other black teas. A study published in the Journal of Analytical Toxicology compared Earl Grey brands Stash and Twinings. It found that the caffeine content ranges from 19 grams to 47 grams per 6 oz, depending on steep times. [7]

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Authentic Earl Grey tea made with a black tea base and bergamot fruit rinds, or herbs contain 20-40 mg of caffeine based on a 1-minute steep time. If it's scented or coated with bergamot oil extract, it will contain 47-70 mg of caffeine. This varies with other tea bases. For example, if your Earl Grey has a Rooibos base, then it will have.. Delving into the Caffeine Content of Earl Grey Tea. The caffeine content of Earl Grey tea varies depending on several factors, including the type of black tea used, the amount of bergamot oil added, and the brewing method. Generally, a single cup (8 ounces) of Earl Grey tea contains between 40 and 60 milligrams of caffeine, which is comparable to the caffeine content of a cup of coffee.