What type of whiskey is characterized by its aging process in new charred oak barrels?

Bourbon whiskey is distinguished specifically by its aging process in new charred oak barrels. This requirement is a critical aspect of bourbon's definition and classification. The interaction between the whiskey and the charred interior of the barrels contributes to its distinctive flavor profile, which includes notes of caramel, vanilla, and oak. The char layer also helps to filter out impurities, ensuring a smoother taste.

In contrast, Scotch whiskey typically involves aging in used barrels, often those previously used for bourbon or sherry, which results in different flavor characteristics. Irish whiskey is also aged in used barrels and may have a different production method, including a triple distillation process that affects its flavor. Canadian whiskey often has fewer restrictions regarding the types of barrels used and can also be blended with grains other than just corn, which further sets it apart from bourbon. Thus, bourbon's specific requirement for aging in new charred oak barrels is what makes it unique among these types of whiskey.