Jack Daniel’s Tennessee whiskey is one of many made using the famed Lincoln County Process, which takes its name from the area where Jack Daniel’s was first made. (Credit: monticello/shutterstock)

Champagne is only champagne if it’s made in its namesake region in France, Scotch is exclusively distilled and matured in Scotland, and a “bourbon” label is reserved for products from the United States. And there’s one variation on the bourbon recipe — Tennessee Whiskey — that’s made exclusively