Double Gold, San Francisco World Spirits Competition 2021. Glendalough's Double Barrel has sucked the marrow out of two casks, bourbon and oloroso. They each bring their own unique flavour and character. While the bourbon barrels add, among other things, sweet, smooth vanilla notes, the oloroso casks layer on those dried fruit and slightly nutty flavours. And of course these are all accented by almost four years resting in Ireland's mild maritime climate.