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Oi Naengguk (Korean Chilled Cucumber Soup) in a glass bowl next to a spoon and chopsticks.
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Oi Naengguk (Korean Chilled Cucumber Soup)

A recipe for Oi Naengguk (Korean Chilled Cucumber Soup)! This refreshing soup pairs a cold and tangy broth with sliced cucumbers and other vegetables.
Course Soup
Cuisine Korean
Keyword cucumber, green onion, Korea, Korean, red pepper, soup, summer
Prep Time 10 minutes
Cook Time 0 minutes
Resting Time: 10 minutes
Total Time 20 minutes
Servings 4 Servings

Ingredients

  • 3 cups (710 milliliters) cold water
  • 1 clove garlic peeled and grated
  • 3 tablespoons (44 milliliters) rice vinegar or apple cider vinegar
  • 2 tablespoons (30 milliliters) soup soy sauce
  • 1 1/2 tablespoons (22 milliliters) green plum syrup/extract Maesil Cheong
  • 1 tablespoon (12 grams) granulated sugar
  • 1-1 1/2 teaspoons sea salt add salt to taste, more may be needed if using regular soy sauce
  • 5 grams (0.17 ounce) dried seaweed miyeok, wakame
  • 1 Korean cucumber about 10 ounces (283 grams), ends discarded and cut into 2 inch (5 centimeter) long matchsticks
  • 1 green onion thinly sliced
  • 1 Korean red chili pepper thinly sliced
  • ice for serving
  • roasted sesame seeds for serving
  • cherry tomatoes optional, halved

Instructions

  • Place the 3 cups (710 milliliters) water in a large bowl.
  • Add the garlic, vinegar, soup soy sauce, green plum syrup, granulated sugar, and salt to the water.
  • Stir well until the sugar and salt have dissolved. Adjust seasonings to taste, adding a little more salt and/or vinegar if needed. Keep in mind the flavors will slowly dilute as the ice melts.
  • Place the bowl in the refrigerator while you prepare remaining ingredients.
  • Place the seaweed in a small bowl and cover with water. Set aside for 5-10 minutes, or until rehydrated and tender. Drain and squeeze out any excess water. Cut into bite-size pieces if not already pre-cut.
  • Gently stir the cucumber, rehydrated seaweed, green onion, and red pepper into the cold broth.
  • Divide the mixture among small serving bowls, add ice cubes, and sprinkle with roasted sesame seeds. If desired, add a few cherry tomato halves.
  • Serve immediately after adding the ice.