This bourbon sipper has been gaining steam in craft cocktails around the world since barman jon santer introduced it to san francisco sometime in the early 00s as part of a promotion for bulleit bourbon (get it? Bulleit in a revolver Ha). Santer calls for tia maria in his recipe, but use whatever coffee liqueur you like. We think its especially nice with a hard-to-find liqueur called firelight, made in the bay area from exceptionally fine coffee.