Triple Cask Matured The Macallan Triple Cask Matured 12 Years Old forms part of our Triple Cask Matured range; a series of single malt whiskies crafted in a triple cask combination of European and American sherry seasoned oak casks and American ex-bourbon oak casks. This complex combination of oak casks delivers an extraordinarily smooth and delicate character, full of citrus fruits, vanilla and fresh oak.