Aged 21 years in oak and finished in Caribbean rum casks, Glenfiddich 21 Year Old Gran Reserva is a Speyside single malt Scotch with a tropical streak. The rum-cask time softens the whisky and pushes it sweet: vanilla, banana, fig, and rich toffee on the nose, then a palate that opens soft before turning brisk and drying, with pepper, oak, lime, and ginger. The finish is long, warming, and spicy. Bottled at 40%, it is a dessert-hour dram for anyone who wants the distillery’s orchard-fruit house style carried somewhere warmer. Serve it neat, after dinner, and give it room to unfold.