Kentucky to Singapore and Back In a bold experiment in 2019, Jefferson’s Bourbon sent 720 barrels from Kentucky to the tropical environment of Singapore. For a span of 18 months, these barrels soaked in the city-state’s scorching heat and humidity.

The brand tells us that this intense climatic exposure accelerated the aging, caramelizing the wood sugars, and infusing the bourbon with unique notes of bing cherry, aromatic spices, toffee, and sea salt. After their tropical stint, the barrels were meticulously blended back in Kentucky to achieve a harmonious flavor profile.