Harviestoun Ola Dubh 21 Year Old is a masterful stout that gains its unique depth and complexity from maturation in 21 year old Highland Park whisky casks. Based on the characterful Old Engine Oil, this beer is aged for at least six months to absorb the rich flavours of the whisky. The result is a dark chocolatey brew with roasty notes and a bittersweet aftertaste infused with subtle whisky nuances. Harviestoun Brewery, which has been brewing high-quality craft beers from the Scottish Highlands for over 30 years, combines its passion for quality with an innovative maturation method that will delight beer and whisky fans alike.