Mellow Gold Emerges From The Famous GrouseJuly 16, 2015Alex BeanWhiskey Articles, Whiskey News Blended, Mellow Gold, scotch, The Famous Grouse, whisky 0 Mellow Gold is the newest blended Scotch whisky to join The Famous Grouse range of whiskies. Matured in both bourbon and sherry casks, Mellow Gold is 40% alcohol content [80 proof] . The Famous Grouse Mellow Gold is available for $34 per bottle.