Chattanooga Straight Bourbon Whiskey Barrel 91 750 MLChattanooga Whiskey 91 is Bourbon Whiskey made from a four grain mash bill which in addition to yellow corn uses Bourbon Whiskey three malted grains: rye malt, caramel malted barley, and honey Bourbon Whiskey malted barley. The mash bill recipe was chosen by master Bourbon Whiskey distiller Grant McCracken Barrel 91 from the 100 barrels distilled at the brand's experimental distillery. Chattanooga Bourbon Whiskey refers to this whiskey as a Tennessee