Gamja Jogae-guk (Potato Manila Clam Soup)

Quick answer

Total time: 35 min
Level: Easy
Servings: 2 servings
Ingredients: 8

About this dish

Gamja jogae guk is a clear Korean soup that brings together the briny, umami-rich depth of manila clams and the gentle softness of potato in a light, unpretentious broth.

The clams are purged of sand first, then added to a pot with potato cut into thin, flat slabs and sliced onion. As the clams open, they release a natural shellfish liquor that seasons the water without any additional stock, giving the broth a quiet but genuine depth. The potato slices cook down gradually, releasing a slight starchiness into the liquid that softens the broth's texture compared to a pure seafood soup. The moment the clams open is the cue to lower the heat, since leaving them in a boiling pot turns the flesh rubbery. Soup soy sauce adjusts the salt level without darkening the clear broth, and sliced green onion scattered over the top at the end adds a clean, grassy note. Despite having only a handful of ingredients and taking fewer than twenty minutes from start to finish, the pairing of clam and potato builds a layered, refreshing flavor that makes this one of the more satisfying simple soups in everyday Korean cooking.

Ingredients (2 servings)

Ingredient	Amount	Unit
clams	250	g
potato	220	g
onion	80	g
green onion	0.5	ea
minced garlic	1	tsp
soup soy sauce	1	tbsp
salt	0.5	tsp
water	1200	ml

Instructions

Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.

6 steps

1

Season

Purge 250 g clams in 3% salt water for 1 hour, using 30 g salt per 1 liter water.

Lift them out, rub the shells together, and rinse until the water runs clear without grit.
2

Heat

Slice 220 g potato into flat 0.5 cm pieces, then cut 80 g onion to a similar size.

Keeping the pieces even helps them cook in the same time and keeps the broth from turning too cloudy.
3

Control

Put 1200 ml water, the potato, and the onion in a pot and set it over medium heat.

Once it begins to boil, lower the heat slightly so it does not overflow, then cook about 8 minutes.
4

Heat

When the potato edges look translucent and a chopstick slides halfway in, add the clams and 1 tsp minced garlic.

Keep the heat at medium and cook just until the clam shells begin opening.
5

Control

As soon as most clams open, reduce the heat to low.

Push any partly opened clams under the broth and cook only 1 minute more, which prevents the meat from shrinking and turning tough.
6

Finish

Season with 1 tbsp soup soy sauce and 0.5 tsp salt, then taste the broth before adding more salt.

Add 0.5 green onion, sliced on the diagonal, simmer 30 seconds, and serve while clear and hot.

Practical Cooking Checks

The cues that matter most while cooking.

Key technique: Gamja jogae-guk brings together manila clams and soft potato in a light, briny seafood broth.
Finish cue: When the potato edges look translucent and a chopstick slides halfway in, add the clams and 1 tsp minced garlic.
Avoid this: Clams turn tough if overcooked; lower heat once they open.

Cooking decision evidence

Calculated Charim data and applicable official food safety guidance.

This recipe

35min, 8 ingredients

Category median

45min, 8 ingredients

Based on 242 recipes

Official safety guidance

Storage and reheating

Refrigerate leftovers in shallow containers within 2 hours and use them within 3 to 4 days. Reheat the center to 74°C.

Source: USDA Food Safety and Inspection Service. Leftovers and Food Safety

Sources checked 2026-08-03

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