Highland single malt Scotch whisky is a type of whisky made in Scotland using only malted barley, water, and yeast, and distilled in copper pot stills at a single distillery located in the Highland region of Scotland. The resulting whisky is aged in oak casks for a minimum of three years before it can be sold as Scotch whisky. Highland single malts are known for their varied flavors and aromas, ranging from floral and fruity to smoky and spicy.