Notes - Jameson Irish Whiskey is made with pure water and a combination of malted and unmalted barley. During the process, the malted barley or malt is dried by warm air. This ensures that smoke does not come into contact with the grain and that the natural taste of the barley shines through in the final whiskey. This is unlike the Scotch production process, in which peat smoke is blown through the malt and flavours it. Triple Distillation: In Ireland, one of the secrets of making whiskey lies in the slow, triple distillation in copper pot stills. This method of distilling gives the whiskey its remarkable smoothness and round flavour. Other whiskeys are distilled only once or twice. Maturation: The mellow, sweet taste of Jameson Irish Whiskey is attributed to the length of time the spirit is allowed to mature in seasoned American and Sherry oak casks that are stored for years in dark, aromatic warehouses.