Why do baristas dial in?
“Dialing in coffee” is basically calibrating the brewing recipe so that a particular coffee tastes its best. The term is especially associated with espresso.
Coffee beans aren't identical. Even if you use the same roaster, a new bag can behave differently because of:
- Roast level
- Bean density
- Origin and variety
- Processing method
- Age/freshness
- Humidity and temperature
- Grinder characteristics
So a grinder setting that worked yesterday may not produce the same extraction today.
