Udon are thick and chewy Japanese noodles made from wheat flour. The noodles are round in shape and they have a firm and chewy texture. In their simplest form, udon noodles are served in kake udon, a noodle soup with a broth made with soy sauce, dashi, and mirin.
Although kake udon is served hot, the noodles can also be served in a cold broth, usually during the warmer seasons. The toppings for udon are also seasonal, and they include tempura-battered vegetables, shrimps, sliced spring onions, fried tofu, or rice cakes.