How Much Caffeine Is In A Starbucks Doubleshot Energy?
A 15-ounce can of starbucks doubleshot energy has 135 milligrams of caffeine, while a 6.5-ounce can of Doubleshot espresso has 120 milligrams of caffeine. Does Starbucks Doubleshot Energy have more caffeine than Monster? Caffeine Content Secondly, Starbucks Doubleshot Energy has almost as much caffeine as the original Monster and Rockstar (146 mg per can compared … Read more