How Much Caffeine Does a Blackberry Refresher Have?
                                
                                
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                                    4 min read                                
                            
                                According to Starbucks, a Grande (16 oz) Blackberry Refresher contains approximately 55 milligrams of caffeine, a modest amount compared to a typical cup of brewed coffee. This refreshing, fruit-forward beverage gets its energy boost from green coffee extract, not traditional coffee beans.