Korean Seafood Knife-Cut Noodle Soup
Quick answer
Haemul kalguksu simmers hand-rolled, knife-cut wheat noodles in a broth built from dried kelp, Manila clams, shrimp, and squid.
What makes this special
- Briny clam liquid and kelp stock flavor the hand-rolled noodles in haemul kalguksu.
- Kelp base stock merges with briny clam liquid as shells open
- Knife-cut noodle starch dissolves into broth creating natural thickness
Key ingredients
Core cooking flow
- 1 Purge 300g Manila clams in 1 liter water mixed with 1 tablespoon salt for at least 30 minutes.
- 2 Soak 10g dried kelp in 1.2 liters water for 20 minutes, then set the pot over medium heat.
- 3 Add the purged clams to the kelp stock and keep the heat at medium.
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.
Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Season
Purge 300g Manila clams in 1 liter water mixed with 1 tablespoon salt for at least 30 minutes.
Thaw the shrimp, remove the vein, and prepare the squid so the seafood can cook quickly later.
- 2Control
Soak 10g dried kelp in 1.2 liters water for 20 minutes, then set the pot over medium heat.
When small bubbles gather around the edge, remove the kelp before a full boil to keep the stock clear.
- 3Step
Add the purged clams to the kelp stock and keep the heat at medium.
As the shells open, skim off foam from the surface so the broth stays clean and the briny clam liquor remains balanced.
- 4Control
Add 100g shrimp and 100g cleaned squid, then simmer only 1-2 minutes.
Once the shrimp and squid turn opaque, avoid extended boiling because seafood becomes tough quickly in the hot broth.
- 5Season
Separate 200g kalguksu noodles as you add them, then season with 2 tablespoons soup soy sauce and 1 tablespoon minced garlic.
Boil 5-7 minutes, stirring during the first minute so the wide noodles do not clump.
- 6Finish
When the noodles look slightly translucent and chewy, add 80g half-moon zucchini and sliced green onion.
Simmer 1 more minute, adjust with salt, and serve immediately while the broth is hot and lightly thickened.
After the steps
Pick a recipe that fits this dish.
Continue with shared ingredients, meal pairings, or a similar method.
Recipes That Go Well With This
More Noodles →Based on shared ingredients and meal pairing
Korean Knife-cut Noodle Soup
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.
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.
Korean Beoseot Deulkkae Jeon (Mushroom Perilla Pancake)
Mushroom and perilla seed jeon brings together oyster mushrooms and shiitake, sliced thin and folded into a batter built on perilla seed powder and a splash of soy sauce. Perilla seeds carry a heavier, slightly bitter nuttiness compared to sesame, and that quality anchors the earthy depth of the mushrooms rather than competing with it. Seasoning the batter directly with soy sauce means the pancake holds its own without a dipping sauce, though one on the side does not go amiss. Frying with enough oil gives the exterior a thin, crisp shell while the mushroom filling stays moist inside. Oyster mushrooms torn along their grain develop a pleasantly chewy bite as they cook; shiitake sliced fine distribute evenly so the whole pancake cooks at the same rate. It works as a makgeolli pairing or a straightforward side, and holds up well at room temperature - the perilla aroma actually deepens as it cools.
Korean Clam Kalguksu (Hand-Cut Noodles in Clam Broth)
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.
Serve with this
Korean Stir-fried Dried Shrimp
Geon-saeu-bokkeum transforms a handful of dried shrimp, a Korean pantry staple, into a quick, crunchy banchan that earns its reputation as a rice thief. The shrimp are dry-toasted in a pan first to drive off residual moisture, intensifying their briny aroma and building the foundation for a crisp final texture. Soy sauce, rice syrup or oligosaccharide, and garlic are added and reduced over low heat until the shrimp are wrapped in a thin, glossy sweet-salty glaze. The timing matters: the moment the syrup bubbles once, the heat must drop immediately, because leaving it even slightly too long hardens the coating into a tooth-testing shell rather than a pliable lacquer. A finish of sesame oil and whole sesame seeds adds a nutty warmth that rounds out this compact side dish. Finely sliced Cheongyang chili mixed in during the last minute produces a spicier variation, and a small handful of almonds or peanuts stirred in enriches the chew. The finished banchan keeps well in a sealed container at room temperature for several days, making it as practical as it is flavorful.
Korean Soy Pickled Onions
Yangpa jangajji is a soy-pickled onion made by immersing large-cut onion chunks in a boiled brine of soy sauce, vinegar, and sugar. The hot brine tempers the raw onion's sharp, pungent bite on contact, and as the pickle matures in the refrigerator the sweet-salty seasoning penetrates evenly through each piece. Cutting the onion along its fiber rather than against it keeps the texture firm and crisp after pickling, whereas thin cross-cut slices tend to soften quickly in the acidic brine. Sliced cheongyang chili peppers added to the jar gradually release their heat into the liquid, lending a gentle, lingering spiciness that offsets the sweetness and keeps the flavors from becoming one-dimensional. The pickle is ready after one day of refrigeration but improves noticeably at three days or more as the seasoning continues to deepen. It is a staple accompaniment to grilled meats like samgyeopsal, where its acidity and crunch cut through richness and refresh the palate between bites. It also works well over bibimbap or cold noodles. The brine can be brought back to a boil and reused for a second batch of onions, making this an economical pantry item.
Napa Cabbage Pear Black Sesame Salad
Napa cabbage is shredded fine for maximum crunch, and Korean pear is cut to matching width so its clear sweetness merges seamlessly with the cabbage's mild crispness. Julienned carrot adds color throughout, while toasted black sesame seeds release a deep nuttiness with each bite. The dressing blends plain yogurt with rice vinegar and honey, staying creamy yet light enough to let the raw ingredients come through without being masked. Salt is kept minimal so the natural sweetness of pear and cabbage leads, making this salad a strong choice as a palate cleanser after a rich or oily main course. Scattering the black sesame seeds just before serving prevents them from absorbing moisture and ensures they retain their satisfying crunch against the soft, juicy pear and crisp cabbage.
Similar recipes
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.
Korean White Clam Clear Soup
Baekhap jogae tang is a clear Korean clam soup built entirely on the flavor of hard clams, with no additional stock of any kind. The clams are soaked in salted water until fully purged of sand, then transferred to cold water in the pot and heated gradually. This slow climb from cold allows the clams to release their maximum flavor into the surrounding liquid before they even open, producing a more richly flavored broth than rapid boiling ever could. Daikon radish simmers in the same water, lending a cool, clean sweetness that tempers the clams inherent saltiness while absorbing broth flavor itself, softening into bite-sized pieces that are worth eating alongside the shellfish. A tablespoon of cheongju, Korean clear rice wine, is added early to neutralize any briny off-notes that might otherwise linger, leaving a cleaner, lighter finish. Garlic appears in small amounts only, deliberately restrained so it does not compete with the delicate shellfish flavor that is the whole point of the dish. Scallion and red chili are placed on top at the very end, contributing color and fragrance rather than direct seasoning. Salt is kept to an absolute minimum since the clam liquor itself provides all the salinity required. The soup is a lesson in simplicity: no anchovy, no kelp, no premade stock. The clams do all the work, and the result is a broth that is simultaneously light and deeply satisfying.
Korean Mallow Clam Soup (Doenjang Mallow and Clam Broth)
Auk-bajirak-guk pairs mallow greens and littleneck clams in a doenjang broth, a combination that Korean coastal households have prepared together for generations. The two ingredients come from the same geographic region - the shallow tidal flats and vegetable gardens of Korea's southern and western coasts - and their flavor profiles complement each other in a way that seems almost deliberate. The clams are purged of sand by soaking in salted water, then brought to a boil until the shells open. The liquid they release is immediately saline and oceanic, becoming the backbone of the broth. Doenjang dissolved into that clam liquor adds fermented earthiness and depth that the brine alone cannot provide. Mallow leaves are added at the very end - less than a minute before the pot comes off the heat. Cooking them longer dulls their color, turns the broth cloudy, and produces an excess of the mucilage the leaves naturally contain. Brief cooking preserves their silky, almost slippery texture, and the small amount of mucilage that does release thickens the broth very slightly, giving it more body. The flavor balance across the three components is precise: the doenjang's savory funk is sharpened by the clam's brininess, and the mallow's gentle sweetness smooths both into a rounded whole. The broth is flavorful enough to eat on its own poured over rice. Spring is the best season for this soup, when young mallow leaves are at their most tender.