Espresso specifications: start with the equipment, then measure the shot

Espresso depends on a controlled relationship between ground coffee, water, pressure and time. A list of isolated numbers cannot define a good shot for every machine. The source supplies traditional examples, but those should be read as a particular reference rather than an instruction to force all equipment into the same settings.

Start with the basket's appropriate dose and the machine manufacturer's guidance. Record the mass of dry coffee and the beverage mass, along with the grind setting and elapsed brewing time. This provides a more reproducible description than an approximate volume alone, especially when crema changes the apparent size of a shot.

Taste the result before adjusting. Make one deliberate change and compare it with the recorded starting point. A timer can highlight a changed flow, but reaching a favored second count does not establish balanced flavor. Likewise, pressure and temperature displays have to be interpreted in the context of what the machine actually measures.