The 2020 Parkers Heritage Collection bourbon has a mashbill of 78% corn, 12% malted barley and 10% rye. It aged in heavy char (Level 5) barrels as opposed to the customary Level 3 for Heaven Hill. Consisting of 102 barrels aged on the sixth floor of rickhouse Y for 10 years, the heavy char brings forth a caramel and maple sweetness, according to the distillery, as well as a slight smokiness.