Kentucky Mule

A Southern spin on the Moscow Mule that swaps vodka for bourbon, bringing warmth and caramel notes to the classic ginger-lime combination.

The Kentucky Mule adapts the framework of one of mid-20th century America's most enduring cocktail creations. The Moscow Mule was created in 1941 at the Cock 'n' Bull pub on the Sunset Strip in Hollywood, born from a partnership between Jack Morgan, who owned the bar and had a surplus of ginger beer, and John G. Martin of Heublein Brothers, who was struggling to sell Smirnoff vodka — a spirit Americans had barely heard of at the time. The resulting drink, served in the now-iconic copper mug (contributed by a third party with a warehouse full of them), launched both the Moscow Mule and mainstream vodka adoption in the United States simultaneously. The copper mug became the drink's calling card: it keeps the drink intensely cold and the metal's conductive surface reacts slightly with the lime juice, brightening the flavor. The Kentucky Mule follows the same formula but substitutes bourbon for vodka, a swap that works because bourbon's caramel, vanilla, and grain character pairs naturally with ginger's heat and lime's acidity. The variation became a staple during the American bourbon renaissance of the 2010s, when bourbon production was booming and bartenders were looking for accessible, familiar formats that showcased the spirit's warmth without demanding a neat pour.