What Brew of Coffee Has the Most Caffeine? Unpacking Cold Brew vs. Espresso
                                
                                
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                                    4 min read                                
                            
                                According to a study cited by Australia's ABC News, while an espresso has the highest concentration of caffeine per ounce, a large serving of cold brew can often contain the highest total amount of caffeine. This reveals that the 'strongest' coffee experience depends heavily on how you measure it, and understanding these nuances is key to getting your ideal buzz.