Top 100 Spirits 2017: The Wine Enthusiast Magazine To create our signature 10-year-old expression, classic unpeated BenRiach spirit is three cask matured for over ten years in bourbon barrels, virgin oak and Oloroso sherry casks. The scotch whisky from each cask is then expertly combined by our Master Blender, adding rich notes of orchard fruits, luscious sweetness and toasted oak spice, working in harmony with our fresh and sweet, fruit-laden style, making a single malt scotch worth its years.