The mad scientists at Booker and Dax may have an in-house centrifuge to make their elaborate concoctions, but for at-home mixologists looking to warm up on a cold day, they recommend the simple, but powerful, Bols Deep.
.25 oz Angostura Bitters
.5 oz Demerara Syrup
2 oz. Bols Genever
Built on a rock, quickly stirred, and served.