Rich Oak is one of Glenfiddich's more deliberately experimental core expressions, originally introduced as a fifteen-year-old and later reformulated as a fourteen-year-old. The whisky takes Glenfiddich's familiar Speyside spirit and finishes it for a relatively short period in two virgin oak cask types — fresh American oak and fresh Spanish oak — before bottling. The aim is to add a layer of pronounced wood character on top of the underlying malt without obliterating the orchard-fruit foundation that defines the house style.
Virgin oak is a demanding cask to use. Without the seasoning of a previous spirit it gives up its tannins and vanillins quickly, and the danger is always that the resulting whisky will taste more of timber than of malt. Glenfiddich's negotiation of the problem is to keep the finishing period short and to lean on a mature fourteen-year-old base whose own character is robust enough to hold its ground.
The nose is bright with vanilla and fresh-sawn oak, a baked apple sweetness and a sprinkle of brown sugar and cinnamon over the top. The palate carries toasted oak, vanilla pod and soft pear, warmed by a clove-edged spice that the new wood introduces cleanly. At 40% the texture is soft but the wood gives it a useful structural backbone. The finish is medium-long and drying, oak spice fading to a soft sweet tail.
It is an honest experiment from a distillery that has earned the right to experiment, and a useful demonstration of what virgin oak can contribute when handled with restraint.
