What are the basic requirements for labeling a whiskey as "straight bourbon"?

To label a whiskey as "straight bourbon," it must adhere to specific legal requirements defined by U.S. federal regulations. One of the primary requirements is that the whiskey must be made primarily from corn, specifically a minimum of 51%. This grain bill is essential because it defines the whiskey's character and flavor profile.

Additionally, the aging requirement for a straight bourbon is set at a minimum of two years. This aging process takes place in new charred oak barrels, which contributes to the whiskey's flavor, aroma, and color. If a bourbon is aged for less than four years and it is labeled as straight bourbon, the bottle must carry an age statement that indicates the age of the youngest whiskey in the bottle.

Furthermore, straight bourbon must not contain any additives or flavoring agents. This regulation ensures that the purity and authenticity of the bourbon are maintained, allowing consumers to enjoy the natural flavors derived from its ingredients and aging process.

In summary, the criteria that a whiskey must meet to be officially labeled as straight bourbon are a grain composition of at least 51% corn, a minimum aging period of two years, and the absence of any additives. Hence, the correct answer encapsulates these requirements accurately.