Orphan Barrel Barterhouse 20 Year Old Kentucky Bourbon WhiskeyBarterhouse 20 year comes from old barrels that had been stored in the Old Stitzel Weller Distillery and were sourced by Diageo. The mash bill is 86% corn, 8% malted barley, and 6% rye. Barterhouse 20 year bourbon is bottled at 90. 2 proof. Tasting notes include warm biscuits and buttercream, with spice and brown sugar in the finish.