Recipe: The Chicago Hot Dog Yield. I serving Preparation time. 10 minutes Cooking time. 10 minutes Assembly time. 2 minutes Ingredients 1 bun length jumbo all beef frankfurter with a natural casing 1 poppy seed bun 1 long squirt of yellow mustard 2 tablespoons sweet pickle relish 2 tablespoons onion, coarsely chopped fine 1/4 medium Roma tomatoes 2 pickled sport peppers 1 kosher pickle spear or fresh cucumber spear, about 5" long 1/4 teaspoon celery salt Notes The frankfurter. In Chicago, all beef hot dogs with natural beef casings are compulsory. No pork, no turkey, no chicken. No crap. Snap and squirt are the hallmarks of a good Chicago Hot Dog, and the snap comes from the casings and the toppings. Skinless hot dogs are best saved for infants and the toothless. Vienna Beef is the preferred brand. The bun. Rosen's is the preferrred brand. Poppy seeds contribute a slightly nutty taste to the bun. These tiny blue-gray seeds come from an opium plant and they contain miniscule amounts of morphine and codeine. Not to fear, you would probably have to eat more than a dozen buns to lose your job. The mustard. There are many different types of mustard, but the classic Chicago Hot Dog is made with yellow "ballpark" mustard. Most of them are made by grinding the seeds from white mustard plants and mixing the powder with vinegar, water, and spices. The relish. In Chicago the pickle relish is brilliant kryptonite green. Sweet and tart, pickle relishes are typically made from chopped cucumbers, bell peppers, green tomatoes, onions, distilled vinegar, and sugar. For the kryptonite green stuff, Blue No. 1 food coloring is added. If you can't find it, and outside of Chicago it is pretty scarce, regular old olive drab pickle relish will do just fine. The peppers. Skinny and about 1-2" long, pickled sport peppers are made by pickling fresh green cured in vinegar and a spiced brine. They are moderately hot but not too hot for wusses like me, and they allow Chicago Hot Dogs to bite you back. Yes, even if you are a feeb, you must have sports for it to be an authentic Chicago Hot Dog. But don't use too hot a pepper. Remember, the Chicago Hot Dog is all about balancing flavors. The pickle. A kosher pickle spear is common, but the best Chicago Hot Dogs, IMHO, use crunchier new pickles. Try Chipco brand from The Chicago Pickle Company. Kosher pickles are made from a special breed of cucumber fermented in a brine, a bath of salt, garlic, black pepper, dill, and vinegar. They are Kosher when they are made in adherence with Jewish dietary law under the supervision of a rabbi. Kosher pickles are never sweet. If you can get fresh whole pickles from a barrel, spears are about 1/8 of a pickle. One of my favorite hot dog carts, Mary Ann's, uses fresh cucumber spears, skin removed, instead of pickles. It may border on heresy, but I love it. The onions. White Spanish onions are typically used because they are both sweet and pungent. They must be chopped fresh or else they get acidic, stinky, and lose their sweetness. The tomatoes. Most hot dog stands use regular round slicing tomatoes cut into two wedge shapes or slices, but I think fresh pear-shaped Roma tomatoes are best because they are meatier and not as runny. I like to dice the tomatoes into 1/4" chunks so each mouthful has tomato in it. Restaurants can't do this because diced tomatoes lose their juice when sitting around. And for goodness sake, when you make hot dogs at home, use ripe tomatoes. Alas, while researching this story, even in August, most hot dog stands used pink rocks rather than real tomatoes.