Bitters

Bitters are produced by infusing a neutral, high-proof alcohol (or sometimes glycerin) with a variety of botanicals, including:

Bark (cinchona, quassia), roots (gentian, rhubarb), or hop flowers.

Bitters are concentrated herbal extracts used as flavor enhancers in drinks and occasionally in food. Often called the of the bar, a few dashes can transform a drink by adding depth, complexity, and balance. What are Bitters?