Korean Knife-cut Noodle Soup
Quick answer
Kalguksu is a Korean noodle soup made with hand-cut wheat noodles simmered in anchovy-kelp broth.
What makes this special
- Rough-surfaced, hand-cut wheat noodles absorb the anchovy-kelp stock in this kalguksu soup.
- Knife-cut noodles have a rough surface that absorbs broth deeply
- Potato starch melts in naturally to thicken the broth
Key ingredients
Core cooking flow
- 1 Put 1000 ml water, 15 gutted dried anchovies, and 1 piece of kelp in a pot.
- 2 After removing the kelp, simmer only the anchovies for 12 to 15 minutes to build a savory base.
- 3 Slice 1 potato thinly, cut 1/2 zucchini into half-moons, and julienne 1/2 onion.
Kalguksu is a Korean noodle soup made with hand-cut wheat noodles simmered in anchovy-kelp broth. The noodles are rolled flat and sliced with a knife, giving them a rough surface that absorbs broth and a satisfying chew distinct from machine-made pasta. Sliced potato, half-moon zucchini, and onion go into the pot, with the potato releasing starch that naturally thickens the broth as it cooks. Seasoning stays minimal - soup soy sauce, salt, minced garlic, and green onion added at the end - so the clean, savory depth of the stock comes through clearly. The dish is traditionally associated with rainy days in Korea, and adding clams turns it into a popular seafood variation.
Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Control
Put 1000 ml water, 15 gutted dried anchovies, and 1 piece of kelp in a pot.
Heat over medium heat, then remove the kelp just before the water reaches a full boil to keep the broth clear.
- 2Control
After removing the kelp, simmer only the anchovies for 12 to 15 minutes to build a savory base.
Skim off foam as it appears, then remove the anchovies so the broth stays clean and light.
- 3Finish
Slice 1 potato thinly, cut 1/2 zucchini into half-moons, and julienne 1/2 onion.
Mince 3 garlic cloves and slice 1 green onion so the finishing aromatics can go in quickly at the end.
- 4Control
Stir 1 tablespoon soup soy sauce and 1/2 teaspoon salt into the broth, then add the potato and onion.
Boil over medium heat for about 5 minutes, until the potato edges look slightly translucent but not broken.
- 5Heat
Shake excess flour from 300 g knife-cut noodles, add them to the pot, and separate them with chopsticks so they do not clump.
When the pot rises hard, add a small splash of cold water and boil 5 to 6 minutes.
- 6Finish
When the noodles float and the broth looks lightly thickened, add the zucchini and boil 2 more minutes.
Stir in the minced garlic and green onion, check the salt level, and serve immediately while the noodles are springy.
After the steps
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Continue with shared ingredients, meal pairings, or a similar method.
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Korean Seafood Knife-Cut Noodle Soup
Haemul kalguksu simmers hand-rolled, knife-cut wheat noodles in a broth built from dried kelp, Manila clams, shrimp, and squid. The kelp forms the stock's clean mineral base, and as the clams open during cooking they release a briny liquor that enriches the broth considerably without any additional seasoning. Sliced zucchini adds a mild sweetness while green onion brings a fresh fragrance to the pot, and soup soy sauce with minced garlic rounds out the flavor into something clean and umami-rich without heaviness. Because kalguksu noodles are rolled thin and cut wide by hand, they release some starch into the broth as they cook, giving the soup a subtle natural body. The wide, flat noodles have a distinctive chewy texture and soak up the seafood broth with every bite, so that lifting a chopstick-full of noodle and clam delivers a concentrated taste of the sea in a single mouthful.
Korean Spicy Gangwon Knife-Cut Noodles
Jang kalguksu is a Gangwon Province style of knife-cut noodle soup defined by dissolving both gochujang and doenjang directly into an anchovy-kelp stock, a combination that sets it apart from standard kalguksu at a fundamental level. The fermented chili paste brings a spicy, rounded sweetness while the soybean paste contributes a dense, earthy richness, and together they build a broth with a complexity that neither ingredient could produce alone. An additional measure of gochugaru piles on a sharper chili heat, giving the soup its signature fiery edge. Potato breaks down as it simmers, naturally thickening the broth without any added starch, while zucchini releases sweetness, and onion and green onion round out the aromatics. Fresh-cut noodles have a smooth exterior and a springy, slightly resistant bite that clings well to the thick, rust-red broth. The dish originates from the mountainous interior of Gangwon Province, where it warmed workers through cold seasons, and the combination of deep umami and lingering heat still makes it one of the most satisfying one-bowl meals in Korean regional cooking.
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Korean Manila Clam Knife-Cut Noodle Soup
Bajirak kalguksu is a prominent Korean noodle dish that consists of wheat noodles prepared by hand and cooked in a broth made from manila clams. The process begins with the preparation of the clams, which are soaked in cold water for at least one hour. This purging stage is necessary to ensure that the clams expel any internal sand or debris before they are boiled. Once cleaned, the clams are placed in fresh water and boiled until their shells open fully. The shells are then discarded, and the resulting stock is strained through a fine cloth to remove every remaining particle of grit. This meticulous straining produces a clear broth where the natural oceanic flavor of the clams remains the primary focus. The salinity of this base is mineral and clean, which distinguishes it from the flavor profile of dashi made with dried and concentrated anchovies. Sliced Korean zucchini and scallions are added to the strained broth and allowed to simmer for five minutes. These vegetables contribute a mild sweetness that helps to soften the natural saltiness of the clam extract. When the hand-cut noodles are added to the boiling liquid, they release starch as they cook. This starch gradually transforms the consistency of the broth, making it slightly thick and viscous so that it adheres to the individual noodle strands. This specific change in texture is what separates kalguksu from other varieties of Korean noodle soup. The noodles are boiled for six to seven minutes until they become translucent, after which the reserved clam meat is returned to the pot. Seasoning with soup soy sauce is performed with caution because the clam stock already contains a high level of natural salinity. Adding an excessive amount of soy sauce can easily mask the delicate marine qualities that define the dish. The overall concentration of the broth is a direct result of the quantity of clams used and the length of the simmering process. If a more assertive flavor profile is preferred, the number of clams used in the initial stage should be increased rather than adding more external seasoning.
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Baekhap kalguksu is a Korean knife-cut noodle soup in which the broth is derived entirely from hard clams rather than the more standard anchovy base. Purged clams are placed in cold water and brought to a boil; once the shells open, the clams are lifted out and the broth is strained through cheesecloth to remove any residual sand or shell fragments. Thinly sliced daikon radish and Korean zucchini cook in the strained broth for five minutes, contributing vegetal sweetness. The hand-cut noodles go in next and are boiled for six to seven minutes until they turn translucent; starch released from the noodles thickens the broth naturally into a lightly viscous, silky consistency without any additional thickener. Once the noodles are cooked, the reserved clam meat returns to the pot, and the soup is seasoned with minced garlic and guk-ganjang. Onion added with the vegetables deepens the broth's sweetness further. Because clam liquor rather than dried anchovy forms the base, the soup carries a distinctly marine, mineral character that permeates every strand of noodle, setting baekhap kalguksu apart from all other regional kalguksu variations. Along the coastal areas of South Chungcheong and Jeolla Provinces, this style of noodle soup has been a local specialty for generations, best in the seasons when clams are most abundant.
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