Understanding Bourbon Before pouring your first glass, it's important to know what bourbon whiskey is and how it's made. Bourbon is a distinct type of American whiskey primarily made from corn, needing at least 51% corn in its mash. It is aged in new charred oak barrels, giving it a unique sweetness and a wide range of flavors, such as caramel, vanilla, and a hint of spice. To be officially labeled as bourbon whiskey, it must age for a minimum of two years. However, many high