Baksok-nakji-tang is the clear octopus-and-noodle soup of the Seosan and Taean coast in South Chungcheong, named for the gourd flesh once simmered into its broth. Small live octopus from the tidal mudflats are dropped briefly into a clean, savory broth set with clams and vegetables, then knife-cut wheat noodles (kalguksu) are boiled in the same pot. The broth is light and bracingly clean rather than spicy — a coastal cousin to the heavier seafood stews — and the octopus is cooked only seconds so it stays tender. It is a celebrated specialty of the Taean peninsula, eaten at its best in late spring when the octopus is sweetest.
The dish grew from the lean kitchens of the Taean and Seosan coast, where the mudflats teemed with octopus and farmers stretched a few of the plentiful creatures into a pot of milguk — the local name for kalguksu and sujebi wheat noodles. The classic name, bak-sok-nakji-tang, points to the bak-sok, the scraped-out flesh and seeds of the bottle gourd, once boiled into the broth to lend it a clean, cooling sweetness. The octopus of May and June, caught as the new wheat came in, was the most tender and prized — the milguk-nakji of the season. It is a coastal folk dish with no single inventor, now a destination specialty of the Taean peninsula.
The broth hits first — light, clear, deeply savory from clams and octopus, clean and almost sweet rather than heavy or fiery. The octopus is the texture to chase: cooked only seconds, it is springy and tender with a gentle snap, never the rubbery chew of overcooked octopus. The knife-cut noodles are soft and slippery, thick and a little uneven, soaking up the briny stock. A handful of garlic, scallion, and chili gives quiet warmth without turning the soup spicy. It eats fresh, oceanic, and restorative — the taste of the mudflat in a bowl.
The whole dish turns on not overcooking the octopus. Octopus muscle is dense with collagen and contracts and toughens fast in heat, going rubbery within a minute; dropped into already-boiling broth for only seconds, it sets just to tender springiness and is pulled before the proteins seize. The broth's clean savor is built from clams and octopus releasing glutamates and other umami compounds into the water, deepened by garlic and radish, with the scraped gourd flesh traditionally adding a mild, cooling sweetness. The knife-cut noodles are boiled last directly in the broth, so the starch they shed lightly thickens and binds the soup, while their thick, hand-cut irregularity holds the stock and gives a soft, satisfying chew.
Variations
The traditional pot is built on bak-sok, the gourd flesh that gives the dish its name, though many modern versions drop it and rely on clams and radish for the clean sweetness. Some kitchens serve it as a pure octopus soup, adding the kalguksu noodles only toward the end, while others make it noodle-forward from the start; a spoon of perilla seed powder or a little chili is a common finish. It is closely related to yeonpotang, the gentler octopus soup, and stands apart from the fiery stir-fried nakji-bokkeum by its clear, unspiced broth.
On the Palate
Where Baksok Nakji-tang sits in the Korean flavor cloud
Ingredients
Serves 3
How it's made
7 steps · 30 min active + 15 min waiting
- 18 min
Clean the small octopus thoroughly, rubbing with coarse salt and rinsing until the slime is gone.
- 215 min
Soak the clams in salted water to purge their grit.
- 312 min
Make a broth with water, the cleaned clams, sliced radish, garlic, and traditionally the scraped flesh of a bottle gourd; simmer until savory and the clams open.
Watch outSimmer the clams gently until they just open and the broth tastes sweet — a rolling boil clouds it and toughens the shellfish.
- 42 min
Season the broth lightly with salt and a little soy sauce, keeping it clean rather than spicy.
- 55 min
Boil the knife-cut wheat noodles directly in the broth until just tender.
- 61 min
Bring the broth back to a hard boil and drop in the whole or cut octopus for only a few seconds, until just turned and tender.
Watch outDrop the octopus into hard-boiling broth for only seconds and pull it the moment it curls and turns — a minute too long and it's rubber.
- 72 min
Ladle into bowls at once with the noodles, scattering scallion and a little chili, and serve immediately.
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