One of the best things about using beer in cocktails is that the possibilities are endless. There are thousands of beers out there, each with its own flavor profile. In addition to just using beer on its own as an ingredient, beer can also easily be turned into a flavored syrup or liqueur, opening up new avenues of creativity for beer cocktails.
I think that the use of beer syrups in cocktails is a fantastic way to incorporate the flavors of a beer without adding carbonation to your drink, because lets face it, not every drink needs to be bright and sparkly. Sometimes you need something stronger that is going to linger in the glass a while.