So Bourbon’s a type of American Whiskey, but since it’s so special we’ve given Bourbon its own index. As Jim Beam puts it, “Bourbon is kinda like whiskey’s “sweet spot”’. Why? Since it is typically made with corn which is a sweet grain. The more corn used, the sweeter the Bourbon. By laws governing Whiskey, Bourbon must be made in the U.S.A., made with at least 51% corn, made without additives and aged in new, charred white oak barrels. Bourbon is All-American.