Dewar'S Blended Scotch Double Aged 32 Year 92 375 MLDewar's Double Double 32 Year is a blended scotch crafted by master blender Stephanie Macleod which is aged in a "four stage aging process." The first step involves single malts and single grains Blended Scotch which have been aged separately at Blended Scotch least 32 years. Next, the Blended Scotch single malts are blended together and rested in exhausted casks. Blended Scotch This process is also done for the single Blended Scotch grains.