Chef Jeong-sun
Aehobak-guk (애호박국, Korean Zucchini Soup)
A clean summer soup of Korean zucchini and salted shrimp, built on quick anchovy-kelp broth and finished before the half-moons lose their shape on a weeknight table.
Culinary Explorer
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Sungeo-guk (Grey Mullet Soup)
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A clear Pyongyang soup built around grey mullet, cleaned with care, simmered gently with radish, and finished with salt and black pepper so the fish stays sweet and the broth stays bright.
Soups & Stews
Korean
Comfort Food
Special Occasion
Weeknight
30 min
Active Time
40 min cook•1 hr 10 min total
Yield4 servings
Grey mullet asks you to cook the month you're standing in. In late autumn and winter the flesh is firm, the smell is clean, and the fishmonger should be able to show you bright gills and clear eyes without being asked twice. In summer, when mullet can turn muddy, Korean kitchens knew enough to change the pot. Technique first, then loyalty to the recipe.
Sungeo-guk belongs to Pyongyang, where the Taedong River fish were prized and the soup stayed pale. People who expect every Korean fish soup to be red with gochugaru misunderstand this bowl. Here the seasoning is salt and black pepper, and that means the fish has nowhere to hide. Clean it properly, simmer it gently, and let it taste like itself.
Notebook 41 says the mistake is boiling. Not seasoning, not garnish, boiling. A hard boil tears the fish, drags blood into the liquid, and gives you a cloudy broth with a tired smell. Tonight the dish asks for restraint: scrape the bloodline, pull the kelp early, skim without impatience, and measure the salt after the fish has given itself to the pot. 손맛 is real; I measure it anyway, so it can be handed on.
Sungeo-guk is most closely tied to Pyongyang and the Taedong River, where grey mullet moving between sea and river were prized enough that Taedonggang sungeo, Taedong River mullet, became shorthand for local quality. Unlike the red, spicy maeuntang common in many southern fish markets, the Pyongyang bowl is clear and seasoned mainly with salt and black pepper, a northern preference that keeps the fish and broth pale. After division, cooks outside the North had to make it with coastal grey mullet or another clean white fish, an adaptation of supply rather than of the soup's character.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
whole grey mullet
Quantity
1 fish (800g to 1kg)
scaled, gutted, gills removed, cut crosswise into 2-inch pieces
coarse sea salt
Quantity
1 tablespoon
for scrubbing the fish
cheongju or soju (optional)
Quantity
1 tablespoon
water
Quantity
7 cups
Korean radish (mu)
Quantity
350g
peeled and cut into 1/2-inch half-moons
dried kelp (dasima)
Quantity
1 piece, about 3 inches square
fresh ginger
Quantity
3 thin slices
garlic cloves
Quantity
2
lightly crushed
scallion whites
Quantity
2
cut into 2-inch lengths
scallion greens
Quantity
2
thinly sliced on the diagonal
fine sea salt
Quantity
1 1/4 teaspoons, plus 1/4 teaspoon more only if needed
divided
freshly ground black pepper
Quantity
3/4 teaspoon
divided
| Ingredient | Quantity |
|---|---|
| whole grey mulletscaled, gutted, gills removed, cut crosswise into 2-inch pieces | 1 fish (800g to 1kg) |
| coarse sea saltfor scrubbing the fish | 1 tablespoon |
| cheongju or soju (optional) | 1 tablespoon |
| water | 7 cups |
| Korean radish (mu)peeled and cut into 1/2-inch half-moons | 350g |
| dried kelp (dasima) | 1 piece, about 3 inches square |
| fresh ginger | 3 thin slices |
| garlic cloveslightly crushed | 2 |
| scallion whitescut into 2-inch lengths | 2 |
| scallion greensthinly sliced on the diagonal | 2 |
| fine sea saltdivided | 1 1/4 teaspoons, plus 1/4 teaspoon more only if needed |
| freshly ground black pepperdivided | 3/4 teaspoon |
Equipment Needed
- •4 to 5 quart heavy pot
- •Fish tweezers or small kitchen pliers
- •Fine skimmer
- •Ladle
Instructions
- 1
Clean the fish
Rinse the mullet pieces under cold running water. Rub the skin, belly cavity, and head with the coarse sea salt, then rinse again. Use a spoon tip or your thumb to scrape away the dark bloodline along the backbone until the flesh looks clean. Pat dry, sprinkle with the cheongju or soju if using, and let it sit 10 minutes. Grey mullet can carry a muddy smell if it is old or poorly cleaned; the blood and slime are what cloud the soup first.
If the fish still smells muddy after cleaning, do not force this soup. My teacher would have sent it back without a word. Use a fresh firm white fish instead, or cook something else from the market in front of you. - 2
Prepare the pot
Put the water, radish, kelp, ginger, garlic, and scallion whites in a 4 to 5 quart pot. Set it over medium heat. The radish gives sweetness and the kelp gives body, but both must stay quiet. This is not a red fish stew and it is not anchovy broth wearing fish on top.
- 3
Keep broth clear
When the water reaches a gentle simmer, about 7 to 8 minutes, pull out the kelp. Leave it too long and it turns the broth slick. Simmer the radish and aromatics 12 minutes more, until the radish edges turn a little translucent. Lift out the ginger, garlic, and scallion whites if you want the cleanest bowl; leave the radish in.
- 4
Add the mullet
Lower the heat to medium-low and slide in the mullet pieces, including the head if you have it. Keep the pieces in one layer as much as the pot allows. Do not stir. A hard boil breaks the flesh and turns the broth cloudy, so let the liquid move gently around the fish instead.
- 5
Skim and simmer
Simmer uncovered for 10 to 12 minutes, skimming foam from the surface whenever it gathers. The fish is ready when the flesh turns opaque and pulls from the bone with light pressure from a spoon. Skimming is not fussing. It is the difference between a bright Pyongyang-style soup and a pot that tastes tired before it reaches the table.
- 6
Season with pepper
Add 1 teaspoon of the fine sea salt and 1/2 teaspoon of the black pepper. Taste the broth after 1 minute, when the salt has settled through it, then add the remaining 1/4 teaspoon salt if it needs sharpening. Add up to 1/4 teaspoon more salt only if your fish and radish were very sweet. Finish with the remaining 1/4 teaspoon black pepper. The pepper should be clear and present, not enough to gray the broth.
- 7
Finish and serve
Scatter the sliced scallion greens over the soup and turn off the heat after 30 seconds. Let the pot rest 3 minutes so the broth settles. Ladle one or two pieces of fish, several radish slices, and clear broth into each bowl, then add a final pinch of black pepper at the table if you like. Serve with rice and mild kimchi, and warn everyone about the bones. That is care, not ceremony.
Chef Tips
- •Buy the fish whole if you can. You need the bones and head for a rounded broth, and you need to see the eyes, gills, and skin for freshness. A fillet-only version will cook, but it will taste thin.
- •The safe shortcut is asking the fishmonger to scale, gut, remove the gills, and cut the fish into steaks. The unsafe shortcut is skipping the bloodline scraping. That dark strip along the spine is small, and it ruins the clarity of the pot.
- •Do not add soy sauce, gochugaru, or a spoon of doenjang because the soup tastes quiet at first. This dish is supposed to be quiet. Salt sharpens it, pepper wakes it, and the fish should still read as fish.
- •If grey mullet is not fresh in your market, use striped bass, sea bass, or very fresh cod cut on the bone. Avoid oily fish here; the broth will turn heavy and the black pepper will fight it.
- •Leftovers are safe for 1 day in the refrigerator if cooled quickly and covered. Reheat gently until hot, without boiling hard, or the fish will toughen and the broth will cloud.
Advance Preparation
- •The radish and aromatics can be cut up to 1 day ahead and refrigerated in a covered container.
- •The fish can be cleaned and cut up to 4 hours ahead. Keep it very cold, loosely covered, and do the salt scrub no more than 30 minutes before cooking so the flesh does not firm too much.
- •This soup is best cooked close to serving. If you must make it ahead, simmer through the fish, cool quickly, refrigerate, and reheat over low heat. Add the scallion greens only after reheating.
Frequently Asked Questions
Nutrition Information
1 serving (about 580g)
Calories
175 calories
Total Fat
5 g
Saturated Fat
1 g
Trans Fat
0 g
Unsaturated Fat
4 g
Cholesterol
60 mg
Sodium
900 mg
Total Carbohydrates
6 g
Dietary Fiber
2 g
Sugars
2 g
Protein
25 g
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