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. It’s the ratio of ground coffee to liquid coffee. So, a 1:2 ratio means that for every gram of coffee in your basket, we’re expecting 2 grams of liquid espresso out. Is the time it takes for your target yield to enter your cup.
What is the 15-15-15 coffee rule?
The 15-15-15 coffee rule, also known as babbie’s rule of fifteens, is a guideline for coffee freshness, stating that green, unroasted coffee should be used within 15 months of harvest, roasted coffee beans within 15 days of roasting, and ground coffee within 15 minutes of grinding to ensure peak flavor. A reminder – fresh roasted coffee’s rule of 3’s. Ground coffee – 3 minutes, roasted coffee – 3 weeks, raw coffee – 3 years.