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Golden Rule CliffsNotes Version DOUBLE SHOT: Equals 2 to 2.5 fluid ounces of water pulled through approximately 14 grams of ground coffee in about 20 to 25 seconds. SINGLE SHOT: Equals 1 to 1.5 fluid ounces of water pulled through approximately 7 grams of ground coffee in about 20 to 25 seconds. Start timing your “extraction” (the shot you are making) when you hit the brew button, and always tamp (pack the coffee into the portafilter basket) with about 30lbs. of pressure.

The Golden Rule Double shot = 2 to 2.5 ounces in 20 to 25 seconds

At the base of the preparation of an espresso there are some rules that barmen and apprentices must follow.