Is 9 bar or 20 bar better for espresso?
Again, the ideal pressure for an espresso shot is 9-bar, which produces a perfect balance of flavor and extraction. 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. 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 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.Regarding fluid ounces alone, it would take about eight espresso shots to fill a coffee cup. However, we strongly advise against drinking that much espresso. The per-ounce caffeine concentration of espresso (63 mg) is far higher than drip coffee (about 12 mg per fluid ounce).Considered too much for most healthy adults is drinking more than five to six single shots of espresso (or three double shots) daily.
Is 15 or 20 bar espresso better?
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. You don’t have to buy fancy bottled waters or special additives that optimize water for coffee making (yes, they exist). Filtering the water from your tap is easy, inexpensive, doesn’t create plastic bottle waste, and can be part of your method for producing great cups of coffee and espresso.An espresso machine uses high pressure to force water through coffee within only a few seconds. Coffee makers rely on the power of gravity to gradually pull water through the filters. The coffee maker is almost always the cheaper option due to its simple function and limited features.