As an expert sommelier and brewer, I can shed some light on the difference between single barrel and double barrel bourbon. Single barrel bourbon is a term used to describe bourbon that is aged in a single barrel throughout its entire aging process. This means that the bourbon is not blended with other barrels and is solely influenced by the flavors and characteristics of the specific barrel it is aged in. On the other hand, double barrel bourbon is a whiskey that undergoes a two-step aging process.
The process of double barrel aging involves transferring the whiskey from one barrel to another for an additional aging period. The first barrel is usually a traditional bourbon barrel made of charred oak, where the whiskey spends a significant amount of time developing its flavors and maturing. After this initial aging period, the whiskey is then transferred to a second barrel, which may be a different type of barrel or have a different char level.
The purpose of double barrel aging is to further enhance the flavors and complexities of the whiskey. By transferring the whiskey to a new barrel, it is exposed to different wood characteristics and may undergo additional mellowing and flavor development. The second barrel can contribute different notes and nuances, such as additional oakiness, spice, or sweetness.
One advantage of double barrel aging is that it allows for more control over the final flavor profile of the whiskey. The blender or distiller can select specific barrels for the initial aging and then choose a second barrel that complements or enhances the desired flavors. This allows for greater consistency and customization in the final product.
Additionally, the double barrel aging process can also help to smooth out any harsh or rough edges that the whiskey may have acquired during its initial aging period. The second barrel can help to mellow and refine the whiskey, resulting in a smoother and more balanced final product.
Personal experience-wise, I have had the opportunity to taste both single barrel and double barrel bourbons. The single barrel bourbons often exhibit a more pronounced and unique flavor profile, as they are solely influenced by the characteristics of the individual barrel. On the other hand, the double barrel bourbons tend to be more complex and layered, with the flavors and aromas from the two different barrels coming together harmoniously.
The main difference between single barrel and double barrel bourbon lies in the aging process. Single barrel bourbon is aged in one barrel throughout, while double barrel bourbon undergoes a second aging period in a different barrel. Double barrel aging can enhance flavors, add complexity, and help to refine the whiskey, resulting in a unique and enjoyable drinking experience.