Trick or treating is one of the most popular activities on Halloween, but for some, the thrill of the holiday comes from something a little more sinister. Creating a blood cocktail is a fun way to get into the Halloween spirit and can be a great drink to serve at a party.

There are many different recipes for blood cocktails, but most include some variation of cranberry juice, vodka, and apple cider. Some recipes also call for grenadine or cherry …