It’s something almost all bartenders have at their disposal, but few use it regularly or even give it much thought. Most often, when it is employed, it’s tossed into a cocktail shaker or rocks glass as almost an afterthought, without strict measurement and in a most casual, borderline-reckless fashion. Even the majority of those who use it likely have little understanding of its composition, alcohol content or history.
That mystery substance? Bitters.
For something that was once