Kalguksu Korean knife-cut wheat noodles

Kalguksu (칼국수, literally “knife noodles”) is a Korean noodle dish consisting of hand-cut wheat flour noodles served in a clear broth, most commonly made from anchovy and kelp (myeolchi-dashima) or seafood. The defining technique is the cutting of rolled dough with a knife into irregular strips, distinguishing it from pulled or extruded noodles. This method produces noodles with a chewy, slightly uneven texture that absorbs broth well.

Origin and history

Kalguksu emerged during the Joseon dynasty (1392–1910) as a practical home dish, using wheat flour that became more widely available after the introduction of wheat farming from China. Unlike Chinese dao xiao mian (knife-shaved noodles), which are shaved directly into boiling water, kalguksu dough is rolled flat and cut into strips before cooking. Japanese udon shares a similar wheat-flour base but is typically thicker and served in a milder dashi broth, while kalguksu broth is more intensely savory from Korean anchovy stock.

Core ingredients and technique

The dough is made from wheat flour, water, salt, and often a small amount of oil, kneaded until smooth, rested, then rolled into a thin sheet and cut into 0.5–1 cm wide strips. The noodles are boiled briefly in the broth, which is seasoned with soy sauce, garlic, and scallions. Common additions include julienned zucchini, carrots, potatoes, and a soft-boiled egg. The dish is often garnished with sesame seeds, chili flakes (gochugaru), and sliced green onions.

Regional and diaspora variants

• Andong kalguksu: A specialty of Andong, North Gyeongsang Province, featuring a rich chicken broth (dak kalguksu) with shredded chicken and vegetables, reflecting the region’s poultry farming tradition.
• Seafood kalguksu (haemul kalguksu): Uses a broth made from clams, shrimp, and crab, popular in coastal areas.
• Manduguk variant: Some versions add mandu (dumplings) to the broth, creating a hybrid dish called mandu kalguksu.
• Bossam pairing: In certain Seoul neighborhoods, particularly Jongno, kalguksu is traditionally served alongside bossam (boiled pork wraps), with the noodles providing a light counterpoint to the rich meat.

Dietary notes

Kalguksu is not inherently vegan or vegetarian due to its anchovy-based broth, though vegetable or mushroom stock can be substituted. The noodles contain wheat gluten, making it unsuitable for those with celiac disease or gluten sensitivity. It is generally halal-friendly if prepared without alcohol-based seasonings, and kosher-friendly if using certified ingredients (though traditional Korean broths may not be kosher). No common allergens beyond wheat and seafood are present in the base dish, though individual additions may vary.