Perhaps the best way to offer a treat to an alien visitor would be to use a silver sauce. Nabisco has produced a limited edition Oreo cookie with this purpose - the cookie being placed on a strange looking cryptic package. This altar is then placed in a window at night. Far beyond a gimmick, however, providing otherworldly beings with cookies, or other foods, is an ancient tradition that acts as a base for our modern Trick-or-Treating, which amounts to a contractual obligation of giving a treat to prevent a trick. This is done to ward off evil, darkness and cold, components embodied by Krampus, or the dark side of Santa Claus. Even Santa's last name refers to a contractual dealing. The cookie is more than a treat, though, because it is covered in Iron crosses and various forms of the Patriarchal or Lorraine cross, both of which give it a masonic and Templar imagery. Even the icing is symbolic of Jesus crucified between two thieves, or the cookie itself.