Espresso around 70. A cup of drip around 100. You need like a fistful of ground to make a single shot of E but barely a spoonful for a cup of brew. Ya’ll?
In: Chemistry
I believe it is due to how the machine works :
* on an espresso machine : the hot water is pressurized and passes quickly through ground coffee. It doesn’t have time to extract that much caffeine.
* in a filter drip machine : hot water drips from the top inside the funnel filled with ground coffee. It has to slowly go through just by gravity. Caffeine has more time to dissolve into water.
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