The coffee to water ratio will vary a lot depending on personal taste. We tend to use a ratio of 1 part coffee to 2 parts water. For a regular espresso, if we have 15 grams of coffee in the basket, we’d be aiming for an espresso shot of around 30 grams (ml). Some people prefer a ristretto (shorter shot) or a lungo (longer shot). Adjust your shot volume and timing according to your personal taste.