What process gives Tennessee whiskey its characteristic charcoal-mellowed profile?

The Lincoln County Process gives Tennessee whiskey its characteristic charcoal-mellowed profile.

In this method, newly made spirit is filtered through or steeped with sugar maple charcoal before it enters barrels for maturation. The charcoal treatment is intended to remove some congeners and soften the spirit’s character. The process is strongly associated with Tennessee whiskey, although legal definitions and individual distillery practices have varied over time.

The name comes from Lincoln County, Tennessee, where the method was historically used. Jack Daniel’s is the best-known commercial example, but the process is not simply another name for distillation. Distillation separates alcohol and flavour compounds by volatility; charcoal mellowing is a separate filtration or maturation-stage treatment.

A common mix-up is assuming that all Tennessee whiskey must be made identically. Tennessee law and brand definitions can contain additional requirements, and some producers have used different interpretations. The Lincoln County Process remains the signature production idea most closely linked with the category.