A Chicago-style hot dog, Chicago Dog, or Chicago Red Hot is an all-beef frankfurter on a poppy seed bun, originating from the city of Chicago, Illinois. The hot dog is topped with yellow mustard, chopped white onions, bright green sweet pickle relish, a dill pickle spear, tomato slices or wedges, pickled sport peppers, and a dash of celery salt. The complete assembly of a Chicago hot dog is said to be "dragged through the garden" due to the many toppings. The method for cooking the hot dog itself varies depending on the vendor's preference. Most often they are steamed, water-simmered, or less often grilled over charcoal .
The canonical recipe does not include ketchup, and there is a widely shared, strong opinion among many Chicagoans and aficionados that ketchup is unacceptable. A number of Chicago hot dog vendors do not offer ketchup as a condiment.