Mutak Udon is a small udon shop near Doseon Sageori by the Seongdong-gu Office, selling udon and gim-mari. Its eomuk udon uses a Korean-style anchovy broth and medium-thick soft noodles, served with gim-mari on the side. A wait forms during the lunch peak, but the shop is less busy after 12:30, and customers can add cheongyang gochu or order it spicy. The space is small, with only a wall-facing table for one and three tables for two.