Hazelburn 15 Year Old Oloroso Cask Single Malt is a whisky produced by Springbank Distillery in Campbeltown, Scotland. It's known for its unique maturation process in Oloroso sherry casks, which impart rich, fruity, and nutty flavors to the whisky. The Hazelburn brand is distinctive in that it is triple distilled, resulting in a lighter and more delicate spirit compared to other Scotch whiskies. The 15-year age statement indicates a well-matured whisky, likely with a balanced complexity of flavors including dried fruits, chocolate, and hints of spice from the sherry cask influence. It's often sought after by whisky enthusiasts for its refined character and limited availability due to its small batch production.