Jack Daniel's first new grain bill in 150 years. This historic creation marries the smoothness of Jack Daniel’s with a unique 70% rye grain bill. Sour Mash is not a type of Whiskey, rather a technique like making sourdough, a portion of the previous batch is used to start the next. These cultures can be centuies old. A big, bold style with a grain forward character that does not overpower. Complex flavours of ripe fruit over lightly toasted oak, a taste rich with spice and a pleasant lingering finish. Seventy percent Rye, the balance in Barley and Corn, Jack Daniel's first new mash recipe since 1866.