Bourbon is perhaps the most well-known type of American whiskey, and it must be made in the United States from a grain mixture that is at least 51% corn. It must also be aged in new, charred oak barrels and bottled at no less than 80 proof. Rye whiskey, on the other hand, must be made from at least 51% rye, and it has a spicy and complex flavour profile.
Tennessee whiskey, which is very similar to bourbon, must be made in the state of Tennessee and undergoes a unique filtering process through maple charcoal, known as the "Lincoln County Process". This gives it a distinctive flavour and smoothness.