A Revolver is a kind of Manhattan variation, where bourbon is mixed with coffee liqueur instead of vermouth. It may sound weird and not that appetizing, but if you like bourbon you're going to fall in love with this balanced cocktail. The spiciness of the bourbon goes really well with the mildly sweet yet punchy flavor of the coffee liqueur.If you haven't tried it yet, I strongly encourage you to try making your own sugar-free…