In general all lighter roasts have more caffeine than the same beans roasted to a darker state. Espresso uses a particularly dark roast and is relatively lower

In general all lighter roasts have more caffeine than the same beans roasted to a darker state. Espresso uses a particularly dark roast and is relatively lower in caffeine content. Of course you don’t drink normal coffee in single shots, and you know the old saying, “Quantity has a quality of its own.” Sipping a beer will get you as much alcohol as shot of whisky, but you can work several shots into a single cocktail.