Korean Chilled Seaweed Soup
Quick answer
Miyeok-naengguk is a Korean chilled seaweed soup designed for the hottest days of summer, when the idea of a boiling pot feels intolerable.
What makes this special
- Miyeok-naengguk offers a chilled blend of sea mustard and cucumber in a tangy cold broth.
- 20-second blanch then cold rinse locks in seaweed's color and bite
- No-cook soy-vinegar brine served ice-cold with no heat applied
Key ingredients
Core cooking flow
- 1 Soak 20 g dried seaweed in cold water for 10 minutes, until the leaves soften and open.
- 2 Drop the seaweed into boiling water for only 20 seconds to reduce any strong sea aroma.
- 3 Cut 1 cucumber into thin matchsticks and slice 1/2 onion as thinly as possible.
Miyeok-naengguk is a Korean chilled seaweed soup designed for the hottest days of summer, when the idea of a boiling pot feels intolerable. Rehydrated sea mustard and thinly sliced cucumber are bathed in a cold broth made from soy sauce, rice vinegar, sugar, and iced water, producing a tangy, lightly sweet liquid that hits the palate with immediate refreshment. The seaweed contributes a slippery, marine texture while the cucumber provides a sharp crunch, and together they give the soup a satisfying range of mouthfeel in each spoonful. Preparation requires no cooking at all - the ingredients are simply mixed, seasoned, and chilled - making it one of the fastest dishes in the Korean repertoire. A generous sprinkle of toasted sesame seeds adds nuttiness on top, and an optional pinch of gochugaru turns the broth a vivid red while contributing gentle heat. The soup pairs naturally with cold noodle dishes like naengmyeon or bibim-guksu, and it improves after an hour in the refrigerator as the seasoning penetrates the seaweed. In many Korean homes, a bowl of miyeok-naengguk is the unofficial signal that summer has arrived.
Instructions
Read the steps as a cooking flow: prep, heat, seasoning, doneness control, and finish.
- 1Prep
Soak 20 g dried seaweed in cold water for 10 minutes, until the leaves soften and open.
Rinse several times to remove grit, squeeze firmly to remove excess water, and cut into bite-size pieces.
- 2Control
Drop the seaweed into boiling water for only 20 seconds to reduce any strong sea aroma.
Rinse immediately under cold water so it stops cooking, stays green, and keeps a pleasantly slippery texture.
- 3Prep
Cut 1 cucumber into thin matchsticks and slice 1/2 onion as thinly as possible.
Soak the onion in cold water for 5 minutes to tame its sharpness, then drain well so it does not dilute the broth.
- 4Season
In a large bowl, first mix 2 tbsp soup soy sauce, 2 tbsp vinegar, 1 tbsp sugar, 1/2 tsp salt, and 1 tsp minced garlic.
Stir until no sugar grains remain, which keeps the cold broth evenly seasoned.
- 5Finish
Pour in 900 ml very cold water to finish the broth.
Taste before adding the remaining 1 tbsp vinegar, and add it only if the soup needs more brightness so the acidity does not become harsh.
- 6Finish
Add the seaweed, cucumber, and onion to the broth, then refrigerate for at least 10 minutes so the seasoning settles into the seaweed. Serve very cold in bowls and finish with 1 tsp sesame seeds.
After the steps
Pick a recipe that fits this dish.
Continue with shared ingredients, meal pairings, or a similar method.
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