Question: how much caffeine in starbucks canned doubleshot espresso?
Answer: Starbucks Doubleshot Energy + Coffee contains 9.67 mgs of caffeine per fluid ounce (32.69mg/100 ml). Starbucks Doubleshot is canned coffee beverage branded by Starbucks but produced by PepsiCo. It is a blend of Espresso and cream that is served in an RTD (Ready-to-Drink) can.