Old Elk's Sour Mash Reserve Batch Series is a nod to the brand's startup roots. Inspired to craft remarkably smooth and innovative whiskeys that transcend tradition, Old Elk took its award-winning, flagship high-malt mash bill and began to explore what would change when experimenting with a different yeast. The robust foundation of the liquid anchors the heady complexities from the unique yeast. The result is a 12-batch release, with each batch consisting of a 30-barrel small batch blend.