After 150 years, the good folks at Fee Brothers in Rochester, New York have learned just about everything there is to know regarding the art and science of making bitters. That’s good news for mixologists around the globe. With cocktails in the midst of a prolonged renaissance, aromatic bitters have again become a prominent and most necessary commodity behind the bar. Having a good selection of bitters on-hand when crafting cocktails is like a chef having access to a broad array of spices. Add a few dashes of this bold, tart, fruity sweetness to liven up a Pisco Sour or a frozen Margarita.