Kong-guksu[2] (콩국수) or noodles in cold soybean soup[2] is a seasonal
Korean noodle dish served in a cold
soy milk broth. In the Korean language, kong means soybean and guksu means noodles. It comprises noodles made with
wheat flour and soup made from ground
soybeans.[3] It is unknown when Korean people started eating kongguksu; however, in accordance with the mention of the dish along with kkaeguksu (깨국수,
sesame noodle soup) in Siui jeonseo, a
Joseoncookbook published around the late 19th century, it is presumed to have originated at least as early as the 19th century.[4]