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. Generally, brew methods with shorter water contact times, like espresso or AeroPress, require a finer grind size. Longer, slower brew methods, like French press, work best with a coarser grind. Grind size is just one variable that affects coffee extraction.
What is the 15 15 15 rule for coffee?
Roasted coffee lasts about 15 days before it goes stale. Ground coffee lasts about 15 minutes before it goes stale. Now, there are exceptions and considerations, like the fact that taste is all subjective and staling is a continuous process, so the 15s aren’t quite rules so much as they are guidelines, or targets. There is something called the 15/15/15/15 rule of thumb. Non-roasted beans will stale in 15 months. Roasted beans will stale in 15 days. Ground coffee stales in 15 minutes.
What is the 10 second rule for espresso?
The 10-second rule for espresso is a general guideline that suggests a well-brewed espresso shot should take around 10 seconds to start dripping from the portafilter. However, this rule is not always accurate, as factors such as coffee roast, grind size, and machine temperature can affect the brewing time. A 1-ounce espresso shot, by comparison, packs roughly 63 milligrams of caffeine; a double shot contains around 126 milligrams, exceeding the buzzy strength of a cup of coffee. So, roughly one-and-a-half espresso shots deliver the caffeine equivalent of an 8-ounce drip coffee.