Jack Daniels is neither a blended nor a single malt whisky. In fact, Jack Daniel’s is technically listed as a “Tennessee whiskey”. And while it fits most of the criteria of bourbon, it’s also not listed as a bourbon because of its use of the Lincoln County Process of filtering through charcoal. Don’t even bring up all the other reasons it could be considered a bourbon unless you want to get into a screaming match with a whisky drinker.