Introducing Jack Daniel's 14-Year-Old Tennessee Whiskey. This marks the first time since the early to mid-1900s that Jack Daniel's has offered an expression at this age. The ingredients and whiskey-making process are the same as Jack Daniel's Tennessee Whiskey corn, 12% malted barley, and 8% rye, charcoal-mellowed drop by drop before entering the barrel. Evolving Jack?s past aged-stated whiskey process, these barrels aged in the upper floors of our barrelhouse and then were relocated to the