mixology

listen to the pronunciation of mixology
Английский Язык - Английский Язык
The "art" of combining various ingredients to make cocktails
mixologist
A person who creates cocktails; a bartender

By the way, the difference between a bartender and a mixologist can be confusing, but normally a bartender serves the patrons at a sit-down style bar, where a mixologist would usually work at a very busy service-style bar.

mixologist
{i} (Informal) one who is adept at mixing cocktails
mixologist
bartender: an employee who mixes and serves alcoholic drinks at a bar