Good espresso at home needs three things: a decent grinder, fresh beans and a little patience while you dial in.
Start with a ratio of 1:2 — 18 grams of coffee in, 36 grams of espresso out — in 25 to 30 seconds. If it runs too fast and tastes sour, grind finer. If it runs too slow and tastes bitter, grind coarser. Change one thing at a time.
Our espresso blend is roasted to be easy to dial in on home machines.