Korean Pork Bone Soup (Gamjatang): Rich, Spicy Stew

Korean pork bone soup, or gamjatang, is a hearty Korean stew of simmered pork neck bones, potatoes, napa cabbage, and a boldly seasoned broth. Perilla seed powder gives the soup a nutty, distinctive finish, while gochugaru brings warmth and color. Recipes vary by cook and region, but a long, gentle simmer is the key to tender pork and flavorful broth.

Ingredients

3 lb (1.36 kg) pork neck bones
8 cups (1.9 L) water, for blanching the bones
12 cups (2.8 L) fresh water, for simmering
1 medium yellow onion (about 150 g), peeled and halved
1 piece fresh ginger, 2 inches (5 cm; about 20 g), sliced
8 garlic cloves (about 25 g), peeled and lightly crushed
2 tablespoons (30 g) doenjang, Korean fermented soybean paste
2 tablespoons (12 g) gochugaru, Korean red pepper flakes
1 tablespoon (18 g) gochujang, Korean red pepper paste
1 tablespoon (15 ml) Korean soup soy sauce; or regular soy sauce, which gives a slightly different, less savory flavor
1 teaspoon (4 g) granulated sugar
½ teaspoon (1 g) ground black pepper
4 small potatoes (about 700 g total), peeled if desired and halved
4 cups (300 g) napa cabbage, cut into wide pieces and blanched until just tender
2 tablespoons (12 g) perilla seed powder
10 fresh perilla leaves (about 15 g), roughly torn
1 cup (50 g) sliced scallions
½ teaspoon (3 g) fine salt to start, plus more as needed
2 teaspoons (10 ml) toasted sesame oil, optional

Instructions

Soak the bones. Put the pork neck bones in a large bowl and cover them with cold water. Soak for 30 minutes, changing the water once if it becomes noticeably pink. This draws out some surface blood and helps the finished broth look cleaner. Drain the bones and rinse them under cold running water. While they soak, measure the seasonings and prepare the vegetables; this recipe allows about 20 minutes of active prep in addition to the soak.
Blanch the pork. Bring the 8 cups (1.9 L) of blanching water to a boil in a large stockpot. Add the bones and boil for 10 minutes. Drain them in a colander, discard the blanching water, and rinse each piece under cool water, rubbing away any gray residue. Wash the pot before using it again. This extra step is worthwhile: the blanching water is not the soup broth.
Start the broth. Return the cleaned bones to the pot and add 12 cups (2.8 L) fresh water, the onion, ginger, and garlic. Bring the pot just to a boil, then lower the heat to maintain a gentle simmer. Partially cover and simmer for 1 hour 45 minutes. Skim foam from the surface during the first 20 minutes, and check occasionally that the broth is gently bubbling rather than boiling hard. Add a little hot water if the bones become exposed.
Season the soup. Lift out the onion, ginger, and garlic with a slotted spoon. In a small bowl, stir together the doenjang, gochugaru, gochujang, soup soy sauce, sugar, black pepper, and salt with a ladleful of hot broth until smooth. Stir this mixture back into the pot. Taste a spoonful of broth; it should be savory and pleasantly spicy, but not yet as salty as the finished soup, because it will reduce slightly.
Cook the potatoes. Add the halved potatoes and simmer for about 15 minutes. Keep the pot uncovered or partly covered so you can judge the liquid level and doneness. The potatoes should be starting to soften but still hold their shape. Very large potatoes can take longer, so cut them into even pieces rather than raising the heat.
Add the cabbage and finish simmering. Add the blanched napa cabbage and simmer for another 15 to 20 minutes, until the potatoes are tender and the cabbage has absorbed some of the seasoned broth. Check a meaty piece of pork with a food thermometer: USDA FSIS lists 145°F (63°C) with a 3-minute rest as the safe minimum for whole cuts of pork; keep the bones in the hot broth for at least that rest, and continue simmering longer if the meat is not tender. Neck bones usually need the full simmer for the meat to become easy to pull from the bone.
Finish and serve. Stir in the perilla seed powder, torn perilla leaves, and most of the scallions. Simmer for 2 to 3 minutes, then taste and adjust with more salt or soup soy sauce. Add the optional sesame oil if you like. Scatter the remaining scallions over the pot and serve while hot.

Tips

Keep the simmer gentle. A hard boil can make the broth cloudy and can break the potatoes apart. Look for small, steady bubbles around the edge of the pot; the bones will still flavor the broth at this pace.
Use perilla if you can find it. Perilla seed powder and fresh perilla leaves are traditional flavors in many versions of gamjatang. Korean or other Asian grocery stores are the most likely places to find them. If the powder is unavailable, use finely ground toasted sesame seeds; the soup will still be good, but it will taste more like sesame and less like perilla. A few extra scallions can stand in for the leaves, though they do not have the same herbal aroma.
Adjust heat and salt at the end. Gochugaru varies in heat, and doenjang and soy sauce vary in saltiness. Start with the listed amounts, then add more chile flakes or salt after the potatoes and cabbage have cooked. If the broth gets too salty, add hot water a little at a time.
Use a large pot and avoid crowding. Bones should sit mostly under the broth, with enough room for the potatoes and cabbage later. If your pot is small, use two pots or simmer the soup in batches rather than packing everything tightly together.

Serving Suggestions

Set the pot on the table while it is still steaming, or portion the broth, pork, potatoes, and cabbage into deep bowls. Serve with hot steamed rice, which balances the spicy, savory broth and makes the meal more filling. Small Korean-style side dishes such as kimchi, danmuji (yellow pickled radish), or lightly seasoned bean sprouts are good contrasts, but they are not required. Put extra scallions, perilla seed powder, and gochugaru on the table so each person can season their own bowl. Provide a spoon for the broth and chopsticks or a fork for the pork and vegetables.

Variations

For a milder pot, reduce the gochugaru to 1 tablespoon (6 g) and leave out the gochujang, then offer extra chile at the table. For more heat, add gochugaru in small increments rather than adding a large amount at once. If pork neck bones are unavailable, meaty pork spine or pork back ribs can work; ribs may become tender sooner, so check them before the full simmer is finished. The flavor and amount of meat will differ, so keep the gentle simmer and use tenderness as your guide.

You can add sliced Korean radish with the potatoes for a fresh, lightly sweet note, or add a handful of sliced mushrooms with the cabbage. If fresh napa cabbage is not available, use blanched, drained napa kimchi for a tangier, saltier variation; reduce the initial salt and taste before adding more. For a thicker-feeling bowl, mash one cooked potato into the broth and stir it in. These are practical adaptations rather than requirements: the defining character of the soup is the pork-bone broth, seasoned with Korean pastes and served with tender vegetables.

Storage and Reheating

Refrigerate leftovers within 2 hours of cooking. Let the soup stop steaming heavily, then divide it into shallow, covered containers so it cools promptly; do not leave the pot at room temperature to cool for an extended period. Refrigerated gamjatang keeps for 3 to 4 days. The broth may set slightly as it chills, and a layer of fat may form on top; both are normal. Lift off some of the solid fat before reheating if you prefer a less rich broth.

Reheat only the portion you plan to eat in a saucepan over medium heat, stirring gently until it is steaming throughout. USDA FSIS recommends reheating leftovers to 165°F (74°C); check the thickest portion with a food thermometer. Add a splash of water if the chilled broth seems too concentrated, and avoid stirring vigorously so the potatoes stay intact. You can freeze the soup for about 2 to 3 months for best quality. Freeze it in meal-size containers, thaw in the refrigerator, and reheat to 165°F (74°C); potatoes may be softer after freezing, but the broth and pork remain useful for a quick meal.

Frequently Asked Questions

What does gamjatang mean?
Gamjatang is the Korean name for this hearty pork-bone stew. It is widely associated with Korean home-style and restaurant cooking, and recipes differ in their seasonings, vegetables, and use of perilla. The word is often translated as pork bone soup or pork spine stew.

Do I have to soak and blanch the bones?
They are separate steps with different purposes. Soaking helps release some blood from the surface, while blanching briefly boils the bones so you can discard the first cloudy water and rinse away residue. You can skip soaking if you are short on time, but blanching and rinsing still help produce a cleaner-tasting broth.

Can I make gamjatang without perilla seed powder?
Yes. Ground toasted sesame seeds are the easiest substitute and add a pleasant nutty flavor, although they do not taste exactly like perilla. If you cannot find perilla leaves, leave them out or finish with scallions. The soup will still be flavorful because the bones, doenjang, and chile seasonings build a substantial broth.

Why is my broth cloudy or greasy?
A vigorous boil can emulsify fat into the broth and make it cloudy; a steady, gentle simmer is easier to control. Blanching and rinsing the bones also remove some surface residue. A little richness is expected. If there is more fat than you want, chill the soup and remove the solid layer from the top before reheating.

How do I know when the pork and potatoes are done?
The pork should be safely cooked and tender enough to pull from the bone without much effort. Use a food thermometer for the pork safety check described in the instructions, and allow the required rest. A thin knife should pass easily through the center of a potato, but the potato should still hold its shape in the broth.

Can I prepare the soup ahead?
Yes. The broth can be made through the long bone simmer, cooled safely, and refrigerated; finish it with the potatoes, cabbage, and final seasonings when you are ready to serve. If the vegetables are already in the soup, store and reheat it as directed above. The flavors often meld overnight, though the potatoes soften more as they sit.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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