Is Jack Daniels vegan

All whiskeys are kosher (for year round use, not for Passover)

In previous versions of this answer, someone stated that Whiskey must be "mevushal". Mevushal (a cooking process) is a special process for wine only, not other liquors. Wine which has been cooked may be handled by non-Jews, and wine which has not been made "mevushal" must not be handled by non-Jews once opened.

In terms of what is required for whiskey to be kosher, Whiskey, like other forms of alcohol, follow a simple rule: the process must not include contact with treif (non-knosher food) and may be opened, drunk and served by Jews and non-Jews alike.