Single malt whisky (and sometimes a third) time. The final spirit, called "new make spirit", generally has an alcohol content of 60 to 70%. Most new-make malt whisky is diluted to about 62.5% a.b.v. before it is placed in casks to mature. The "new-make spirit", or unaged whisky, is then placed in oak casks to mature. By law, all Scotch whisky must be aged for a minimum of three years in oak casks, though many single malts are matured for much longer. The whisky continues to develop and change as it spends time in the wood, and maturation periods of twenty years or
Small batch whiskey Small batch whiskey Small batch whiskey is whiskey produced by mixing the contents of a relatively small number of selected barrels. Small batch whiskeys are commercially positioned for the upper-premium market. The term is most commonly used for American whiskey but is sometimes used for other whiskeys as well. For example, the Bowmore distillery in Islay, Scotland, has produced a single malt Scotch whisky labeled as "small batch". American small batch whiskeys are typically aged from six to nine years in oak barrels, but more limited series that are aged up to 23 years are also available. There are generally