From The Food Encyclopedia by Jacques Rolland and Carol Sherman
An ancestor of the ubiquitous hot dog. The genuine frankfurter is made of lean pork and salted bacon fat blended into a paste and smoked, but there are now many variations in ingredients, as well as in size and shape. Often the ingredients include beef and pork trimmings, tripe and pig hearts. American frankfurters contain beef and pork. Vienna sausage is a small "cocktail" frankfurter. Knackwurst is a small, plump, lean-meat frankfurter containing beef and pork. See also hot dog.
