What is the 30 second rule for espresso?
The 30-second extraction rule suggests that a well-balanced espresso shot should take approximately 25-30 seconds to extract when using 18-20 grams of ground coffee and yielding about 30-40 milliliters of espresso. Serving Size. Most standard espresso cups are designed so that they can serve a single shot of espresso with an average serving size of 30ml, and double shot of espresso, with an average serving size of 60ml.The energy boost and rich flavor are hard to resist, but there’s definitely a line between “fuel for the day” and “asking for trouble. Most healthy adults can safely consume up to 6-7 single espresso shots per day, keeping you under the 400mg daily caffeine cap.
Is 10 bar too much for espresso?
Too much more than 9-bar can result in a burnt-tasting espresso, while too less than 9-bar will produce a weak and overly bright shot. When pulling an espresso shot, the barista should always start by achieving the recommended 9-bar of pressure. Espresso is defined at around 9 bars of pressure. Some machines advertise 15–20 bar pumps, but that figure refers to maximum pump output, not the pressure used for brewing. The best espresso comes from a stable 9 bar; anything higher doesn’t improve flavour.