What is the defining characteristic of single grain Scotch?

Single grain Scotch is defined by the inclusion of unmalted grains in its production process. While the term "single grain" may suggest a focus on one type of grain, it actually refers to a whisky produced at a single distillery using not just malted barley, but also other grains, such as corn or wheat. This differentiates single grain Scotch from single malt Scotch, which must be made exclusively from malted barley.

The production of single grain whisky allows for a broader range of flavors and textures due to the variety of grains used, and it typically undergoes continuous distillation, which can result in a lighter body compared to single malts. This characteristic is what clearly defines single grain Scotch, emphasizing the inclusion of unmalted grains as an essential aspect of its identity.