How Much Caffeine Is In Earl Grey Tea From Starbucks? Earl Grey tea from Starbucks contains approximately 40-45 mg of caffeine per serving. Conclusion. Earl Grey tea, a beloved choice among tea enthusiasts, contains a moderate amount of caffeine. Although not as high as black tea, Earl Grey's caffeine content offers a refreshing pick-me-up.. How Much Caffeine in Earl Grey Tea? The caffeine content of Earl Grey tea varies depending on factors such as the type of tea leaves used and the brewing method. On average, a standard cup of Earl Grey tea contains approximately 47mg of caffeine. However, this can fluctuate based on individual preferences and brewing techniques.

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Tea. Caffeine in Earl Grey Tea: On average, a typical 8 oz cup of Earl Grey tea contains about 55-90 mg of caffeine. Caffeine in Coffee: In contrast, an 8 oz cup of coffee generally boasts a higher level of caffeine, ranging from 95-200 mg depending on the type and strength of the brew. It is clear that coffee tends to have a higher caffeine.. How much caffeine is in Earl Grey tea? The exact amount of caffeine in Earl Grey tea can vary based on the type and steep time. On average, a cup of Earl Grey has anywhere between 50 and 90mg of caffeine. As far as the tea spectrum goes, this is a moderate-to-hight amount of caffeine content.