Ttaengcho Udon is an udon restaurant in Sadang-dong, Dongjak-gu, Seoul, where the noodles are served spicy alongside soju. The broth has a familiar, additive-seasoned taste with a sharp spicy kick added on. The place has been open for a long time, drawing late-night second and third rounds of drinkers, and it gets crowded on weekends. The interior has the loud atmosphere of a drinking spot and is busy.