Johnnie Walker Select Casks is a scotch blend that showcases the best of Scottish blending and maturation expertise. With Cardhu single malt at the heart of the blend, Johnnie Walker uses whiskies matured for at least ten years in first-fill American oak casks to create this blend. It is then finished in ex-rye whiskey casks, creating a complex new whiskey with rich layers of flavor starting with creamy vanilla notes and transitioning to a spicier finish.