Korean cucumber kimchi, known as oi sobagi, is a delicious and refreshing side dish perfect for summer. This stuffed cucumber kimchi is crispy and crunchy, ferments well, and stays crisp until finished. Plus, it’s easy to make at home!

Stuffed cucumber kimchi (oi sobagi) in a serving dish.

Summer is a great time to make kimchi with light and refreshing vegetables. Among all the choices, cucumbers are at the top. Who wouldn’t love the crisp, crunchy, and refreshing taste of cucumber kimchi?

There are two types of Korean cucumber kimchi: stuffed cucumber kimchi, called “Oi sobagi (오이 소박이),” and cut-up cucumber kimchi, known as “Oi Kimchi (오이김치).” If you want a crunchier option that stays crisp longer, choose Oi sobagi.

Cucumber kimchi (oi sobagi) stored in an airtight container.

Why Stuff Cucumber Kimchi?

Stuffing cucumbers with kimchi filling, called “soh,” preserves their texture and flavor. This method allows for slow fermentation, making the kimchi taste better using the traditional method.

While cut-up cucumber kimchi is quicker to prepare, it ferments faster and can become mushy quickly. If you want to enjoy the full-bodied, crunchy flavor of authentic Korean cucumber kimchi, go with the traditional stuffed cucumber recipe. It’s easy to make and brings a delicious result. Give it a try and taste the difference!

I want to point out that some people confuse cucumber kimchi with Korean cucumber salad (oi-muchim). They are not the same and are made completely differently. Korean cucumber salad is a quick Korean side dish and is not intended to be fermented.

Oi sobagi slices in a serving dish.

What Cucumbers to Use

It’s best to make oi kimchi or oi sobagi in the summer when cucumbers are in peak season and taste their best. Start with the right type of cucumber for making kimchi. Here are some options for kimchi cucumbers:

  • Korean cucumbers: These are long and slender with a pale green color and a very crunchy texture. They are widely available in most Korean grocery stores during the spring and summer.
  • Kirby cucumbers: Widely used as pickling cucumbers and available anywhere. With a tender skin, they are suitable for making kimchi and maintain their crunchiness.
    • I chose Kirby cucumbers for this recipe.
  • Persian Cucumbers: They are similar to Kirby cucumbers but slightly longer and equally crisp.
  • English Cucumbers: These can be used if other types are unavailable. They have a thin skin and few seeds but may need to be cut into smaller pieces.

How to Make Cucumber Kimchi (Oi Sobagi)

Brine cucumbers

Kirby cucumber in a cross pattern with a knife.

With a sharp knife, cut through a cucumber in a cross pattern leaving one end uncut.

Salted boiling water poured into a bowl with cucumbers.

Mix salt in hot boiling water pour over the cucumbers in a mixing bowl.

Note: Don’t worry, the hot water won’t cook the cucumber. This traditional method, used for Korean pickled cucumbers called oiji, keeps them crisp and crunchy for a long time.

A heavy plate placed on the cucumbers in salt brine.

Place a weight on top of the cucumbers to keep them submerged in the salt brine. Allow them to sit for 1 hour, then drain.

Prepare Cucumber Kimchi Filling

Cucumber kimchi filling made with chives and chili flakes in a bowl.

Combine the sliced chives and other vegetables with the seasoning ingredients to create a paste-like filling

Stuff Cucumbers

Stuffing cucumbers with kimchi filling.

Fill the cucumbers with the kimchi mixture, making sure to coat the outside of the cucumbers with the filling as well.

Cucumber kimchi packed in a glass container.

Place the stuffed kimchi in an airtight container and cover it securely. Enjoy your cucumber kimchi within a few days for a fresh taste.

How to Ferment

For a fermented flavor, leave it at room temperature for 1 day, then refrigerate. It will continue to ferment in the fridge, deepening in flavor while staying crisp. Consume within a month, as this kimchi ferments quickly and isn’t meant for long-term storage.

Stuffed cucumber kimchi in a serving dish.

Helpful Tips

  1. Why using salted boiling water? It softens the cucumber skin and helps them lose their stiffness quickly. Boiling water also aids in faster salt penetration, keeping the cucumbers crunchy longer. This method ensures the kimchi retains its texture for an extended period.
  2. If you can’t find Asian chives (buchu) in kimchi filling, try scallion (green onion) instead. Korean radish salad in my bossam recipe also makes a great filling alternative.

This recipe was originally posted in June 2011. I’ve updated the recipe with a few changes, new photos, and more information.

Traditional cucumber kimchi (Oi-Sobagi) is stuffed with Asian chives, carrot, onion, Korean chili filling

Oi Sobagi (Korean Stuffed Cucumber Kimchi)

Korean cucumber kimchi, or oi sobagi, is a delicious and refreshing summer side dish. Crispy, crunchy, and easy to make at home, it stays crisp through fermentation.
5 from 10 ratings

Recipe Video

Ingredients

  • 8-10 Kirby cucumbers, 4 English cucumbers or 6 Korean cucumbers
  • 8 cup (2 liter) water
  • 5 tbsp Korean coarse sea salt

Kimchi Filling

Instructions 

  • Cut through a cucumber in a cross pattern, but leave one end of the cucumber uncut. Put cucumbers in a large mixing bowl.
  • Combine water and salt; bring to boil. Pour the boiling salted water over the cucumbers in a mixing bowl. Put a weight on top of the cucumbers so that they stay immersed in the salt brine. Let them sit for 1 hour, then drain.
  • To make the kimchi filling, mix together the Asian chives, onion, carrot, Korean chili flakes, Korean anchovy sauce, garlic, ginger puree, sugar, Korean plum extract (optional), sesame seeds, and water in a mixing bowl.
  • Stuff the cucumber with the kimchi filling, coating the outside of the cucumber with the filling as well. Stack the stuffed cucumber kimchi in an airtight container and cover.

To store and ferment cucumber kimchi

  • Enjoy your cucumber kimchi within a few days for a fresh taste. For a fermented flavor, leave it at room temperature for a day, then refrigerate. It will slowly ferment in the fridge, staying crisp while the flavor deepens. Consume within a month, as this kimchi is not meant for long-term storage.
Calories: 34kcal, Carbohydrates: 6g, Protein: 2g, Fat: 1g, Saturated Fat: 1g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 1g, Sodium: 3575mg, Potassium: 196mg, Fiber: 2g, Sugar: 3g, Vitamin A: 2335IU, Vitamin C: 5mg, Calcium: 44mg, Iron: 1mg
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