Mak guksu is a Korean buckwheat noodle dish served in a chilled chicken broth, sometimes served with sugar, mustard, sesame oil or vinegar. It is closely related to naeng myun but the differences lie in the high concentration of buckwheat flour in its noodles and the use of greater amounts of vegetables. The dish gets its name "rough noodles" from the fact that the buckwheat used is generally unhulled.
 
Wheat Flour 96.5%, Salt 0.5%, Water 3%