title_body: Caffeine content of different brewing methods
upvoted_answer: Short answer: No
  Slightly longer answer: The temperature, pressure and method of brewing barely impact the amount of caffeine extracted from the bean.
  Because caffeine dissolves so readily in hot water, the single most important factor in determining the amount of caffeine in the cup is the amount of coffee used to prepare said cup. Arabica beans contain about 0.8-1.4% of caffeine by weight, depending on the variety. So if you were to brew an espresso (15g in 30g out) or a pour over (15g in 250g out), you would have the same amount of caffeine in each beverage.