Which whisky style is traditionally made from malted barley in one distillery?

Single malt whisky is traditionally made from malted barley at one distillery.

The term “single” refers to one distillery, not to one cask or one year. A single malt can combine spirit from many casks and different production batches, provided the whisky comes from the same distillery. “Malt” indicates that malted barley is the cereal grain used in the mash under the traditional Scotch definition.

Single malt whisky is most strongly associated with Scotland, where Scotch single malt must be produced at a single distillery, made from water and malted barley, and distilled in pot stills. It must also mature in Scotland for at least three years to qualify as Scotch whisky.

A blended malt combines single malts from multiple distilleries. Single grain whisky comes from one distillery but may use grains other than malted barley and is generally produced in column stills. These terms describe production categories, not a universal ranking of quality.