American Whiskey

American whiskey is a broad category that encompasses a number of distinct styles produced in the United States, including bourbon, rye whiskey, Tennessee whiskey, wheat whiskey, corn whiskey and American single malt. These styles are governed by US production regulations covering aspects such as grain recipes, distillation limits, cask type and, in some cases, minimum maturation periods.

Whiskey is the broader category. Bourbon is one particular type of American whiskey with its own legal requirements. To qualify as bourbon, it must be made in the United States from a grain recipe containing at least 51% corn, distilled to no more than 160 proof, entered into new charred oak containers at no more than 125 proof, and bottled at no less than 80 proof.

Bourbon is a style, not a region. While Kentucky is closely linked with bourbon and remains its most famous home, bourbon can legally be produced anywhere in the United States provided it meets the required standards of identity.

A whiskey must meet specific legal standards to be labelled bourbon. It must be produced in the United States, use a mash bill of at least 51% corn, be distilled to no more than 160 proof, entered into new charred oak containers at no more than 125 proof, and bottled at 80 proof or above. If it is labelled straight bourbon, it must also be aged for at least two years, and if it is under four years old it must display an age statement.

Tennessee whiskey is typically produced to the same fundamental standards as bourbon, but with an extra charcoal mellowing step linked to the Lincoln County Process. In Jack Daniel's case, the new spirit is slowly filtered through sugar maple charcoal before it enters the barrel, which adds to its smoother character.

Straight bourbon means the whiskey has been aged for at least two years and hasn't been blended with other spirits, colouring or flavouring. If the bottle doesn't carry an age statement, it must be at least four years old. The term indicates a more tightly defined category rather than simply a better or more premium bourbon.

Because US law requires it. Bourbon must be matured in new charred oak containers, which is one of the main reasons it develops such distinctive notes of vanilla, caramel, spice and oak. Once those barrels have been used for bourbon, they can't be reused for bourbon again, which is why ex-bourbon casks are widely sold on to Scotch, Irish whiskey, rum and other spirits producers.

In bourbon country, hot summers, cold winters and changing humidity cause barrels to expand and contract more dramatically than they typically do in Scotland's cooler climate. That seasonal movement forces spirit in and out of the oak more aggressively, which tends to accelerate extraction from the wood and can help American whiskey develop colour and cask-driven flavour more rapidly.

Rye whiskey is another major American whiskey style, but rather than being built around corn it must be made from a mash bill containing at least 51% rye. In terms of flavour, bourbon often leans towards vanilla, caramel and sweetness, while rye is typically drier, spicier and more peppery, with more herbal or grain-driven character.

Jack Daniel's is labelled and marketed as Tennessee whiskey, not bourbon. It's often discussed alongside bourbon because it's made from a largely similar mash bill and aged in new charred oak, but the key distinction is the charcoal mellowing process used before ageing. That additional step is why the brand positions it as Tennessee whiskey in its own right.