Michters, Sour Mash, Small Batch, US*1Distiller Notes Whisky Of The Year for 2019 by The Whisky Exchange, Michters US*1 Sour Mash Whiskey became the first whiskey made in the United States to ever achieve this honor. During the 1970s and the 1980s, Mitcher's Original Sour Mash Whiskey was the distillery's single most popular product. While the "Sour Mash" moniker originated from the whiskey production process of the same name whereby some previously fermented mash is used as the starter