Scotch whisky is a type of malt or cereal whisky made in Scotland from as early as the 15th century onwards. From a legal point of view, Scotch whisky must strictly observe certain rules, such as: the product must be distilled in Scotland from malted barley, water, and yeast (rarely, other types of wholegrain cereals are accepted). Distillation is performed at a maximum of 94.8% alcohol by volume and a minimum of 40%. It is aged in oak casks with a maximum capacity of 700 litres for at least three years. The only colouring allowed is caramel (E150A).
Scotch whisky can be single malt (made by a single distillery, from malted barley), single grain (made by a single distillery, from wheat/maize), blended grain (made from several single grain types) or blended (made from single malt and single grain).