This hot dog variety is a street food staple in Washington D. C., made with a mildly smoked beef and pork sausage in a natural casing as the key ingredient. This sausage is thicker than the average hot dog sausage, the meat is ground more coarsely, and it has a spicy kick due to red pepper flakes that are dispersed throughout the meat.
The sausage is placed on a split roll, then topped with chili, or sometimes with mustard and diced onions. There are numerous theories regarding the name of this hot dog – many people say that it's smoked halfway, some claim that it's cut in half when grilled, while others claim that the name is derived from the fact that the sausage is made with equal amounts of pork and beef.