A Chicago-style hot dog is a special type of hot dog that is made with beef and it has a bunch of toppings on it.
The hot dog itself is cooked in boiling water and it is put into a special bun that is steamed so it is soft.
The toppings on a Chicago-style hot dog are very important. They include mustard, onions, bright green relish (which is made from sweet pickles), tomato slices, a pickle spear, sport peppers (which are small green peppers that are a little spicy), and celery salt.
Some people might say that ketchup should be put on a hot dog, but in Chicago, it is considered a big no-no.
When you eat a Chicago-style hot dog, all of the different toppings work together to make a delicious combination of flavors. It might seem like a lot of things to put on a hot dog, but trust us - it's worth it!