American greatness is making a comeback. During the 1970ís and 1980ís, whiskey lovers made Michterís Original Sour Mash Whiskey the distilleryís most popular type. In 1989 Michterís Original Sour Mash disappeared from the marketplace Ė until now. December 2012 marked the first release of Michterís Original Sour Mash Whiskey in 23 years. It is made according to the traditional sour mash whiskey making process whereby some previously fermented mash is used as the starter for the new mash to be fermented. Typically in most sour mash whiskeys, this ďsetbackĒ from the prior fermentation accounts for about 10 to 20 percent of the new mash to be fermented. More than just a sour mash process whiskey, Michterís Original Sour Mash is made from a special selection of grains, barrel aged, and later on filtered according to the exacting Michterís standards.