Few cocktails have shaped the history of mixology quite like the Old Fashioned. Behind its apparent simplicity lies a carefully balanced combination of spirit, sugar, bitters, and dilution. Widely regarded as the blueprint for the modern cocktail, it highlights the quality of its ingredients and the precision of its preparation rather than the complexity of its recipe. Although it is most commonly associated with bourbon today, the Old Fashioned can also be crafted with rye whiskey or other base spirits, each bringing its own unique character to the drink. Its evolution over the past two centuries has made it one of the most influential cocktails ever created, inspiring countless variations that remain staples in bars around the world. In this guide, you’ll discover the story behind the Old Fashioned, the principles that have made it timeless, the techniques that define a well-executed version, and our professional recommendations for achieving consistent results, whether you’re mixing at home or behind a professional bar.