The Darkest Distinction Matured in an inspired combination of both bourbon and sherry casks, it’s the final three years spent in Oloroso sherry casks that gives Bowmore 15 Years Old ‘Darkest’, one of the most beautifully balanced Bowmores, the rich, deep colour reflected in its name, and its warming finish. Tasting Notes On the eye treacle dark amber. Breathe in delicious dark chocolate, sun-dried fruits and a tell-tale wisp of Islay smoke. Sip wonderful cedar wood and rich treacle toffee. Savour the robust and complex finish with a hint of sherry tannin.