"Natterjack The Mistake" is an Irish whiskey that was initially created by accident. It's a heavily oaked whiskey, aged in former bourbon barrels and finished in virgin American oak, resulting in a bold and unforgettable flavor profile. The "mistake" refers to an extended period of aging in the virgin oak, which was initially unintended but ultimately led to the unique character of the whiskey, according to Natterjack Irish Whiskey.