Bardstown Bourbon Company has introduced a revolutionary whiskey, the Distillery Reserve Mars Single Malt Japanese Blend, set to launch on May 29. This innovative spirit is the result of a collaboration with Mars Whisky and showcases a unique aging process where Kentucky bourbon and Japanese single malts from Mars’ distilleries age together in the same barrel.

This approach differs significantly from traditional finishes, where one spirit influences another primarily in the final stages of aging. By co-aging the whiskies for a full year, they integrate deeply, resulting in a product that reflects the richness of both Kentucky bourbon and Japanese whisky. Dan Callaway, Bardstown’s master blender, emphasized that this method is about “true integration,” creating a whiskey that offers complex flavors shaped by both traditions.

The Japanese whiskies involved are no ordinary spirits; they include the Komagatake single malt, which previously matured in Umeshu plum liqueur barrels, and Tsunuki whisky aged in rare Sakura cherry wood casks. These distinct characteristics blend with Kentucky bourbons aged for 10 to 16 years to produce flavors of caramelized plums, roasted malt, vanilla bean, and toasted oak, culminating in a sophisticated finish.

This release, priced at $99.99 for a 375mL bottle and bottled at 109.8 proof, will be available in limited quantities exclusive to Bardstown Bourbon’s gift shop and Louisville tasting room. If this whiskey quickly sells out, enthusiasts can take heart knowing another whiskey blending American and Japanese traditions is already aging in Japan, hinting at an exciting future for this cross-cultural innovation in whiskey-making.