Dewar’s Scotch 15 Year is an intermediate expression, expanding upon the 12 and 18 year olds in the lineup. Mixed by Master Blender Stephanie Macleod, this single malt is a blend of up to 40 whiskies aged in ex-sherry and bourbon casks, then married together in oak casks. Blending is an art, finding harmony can be challenge as older and younger whiskies have their own unique characteristics. But Dewars has proved themselves masters of this alchemy with their world renowned line-up.