Bottled at a robust 107 proof, this exceptional bourbon far outlasts its siblings in the Evan Williams family. Crafted from a traditional mashbill of 78% corn, 12% malted barley, and 10% rye, these barrels have matured for nearly a quarter century in Heaven Hill's warehouses. Unlike most ultra-aged expressions that get proofed down significantly, this bourbon maintains its higher strength, preserving precious liquid from barrels that have already surrendered much to the angel's share. As one of only three ongoing 23-year bourbon releases available today, this gift shop exclusive offers a glimpse into bourbon's upper age limits that few distilleries attempt to explore.