Stuffed Cucumber Kimchi (Oi Sobagi)

Cucumber Kimchi (Oi Sobagi) is a classic Korean summer kimchi made by stuffing crisp cucumbers with garlic chives, garlic, and Korean chili flakes. This traditional recipe stays crunchy as it ferments and develops the bold, tangy flavor that makes kimchi so irresistible. Serve it as a refreshing Korean side dish with rice, grilled meats, noodles, or your favorite Korean meals.

Every summer, my mom made large batches of oi kimchi (오이김치) known as oi sobagi (오이 소박이) when cucumbers were at their peak. She would line up piles of cucumbers on the kitchen counter, carefully brine them, then stuff each one with a savory mixture of buchu, garlic, and gochugaru. It took time and patience, but it was one of the summer foods I looked forward to most.

We’d eat some fresh on the day she made it, but I always liked it best after it had fermented for a day or two. The cucumbers stayed crisp while the flavor became deeper, tangier, and more complex.

Over the years, I’ve tested faster cucumber kimchi methods that skip the stuffing step, but I always come back to the traditional approach. My mom was right. Stuffing the cucumbers helps them hold their texture better and creates a more balanced flavor as they ferment.

That’s why this recipe follows the classic oi sobagi method. I’ve streamlined a few of the steps to make it easier for home cooks, but I still believe the extra few minutes of stuffing are worth it for the texture and flavor.

If you enjoy traditional kimchi recipes, be sure to browse my collection of Korean kimchi recipes. For another summer favorite, try my Yeolmu Kimchi made with young radish greens.

Why Oi Sobagi Is Korea’s Favorite Summer Kimchi

Oi Sobagi is one of the most beloved cucumber kimchi recipes in Korea. During the summer months, when cucumbers are abundant and at their peak, many families make cucumber kimchi alongside napa cabbage kimchi or instead of it.

One reason for its popularity is speed. While napa cabbage kimchi often benefits from longer fermentation, cucumber kimchi develops flavor quickly and can be enjoyed the same day or after a short fermentation period. The crunchy texture and refreshing taste make it especially welcome during hot weather.

Another reason is versatility. Oi Sobagi pairs beautifully with grilled meats, rice dishes, noodles, and soups. I especially enjoy it alongside Bulgogi (Korean BBQ), or a bowl of Mul Naengmyeon during the summer.

Best Cucumbers for Cucumber Kimchi

The type of cucumber you use can make a big difference in the final texture of your cucumber kimchi.

• Korean cucumbers: Traditionally used for oi sobagi. Their thin skin, firm flesh, and low seed content help them hold its texture during fermentation.
• Kirby cucumbers: My preferred substitute and the variety I use most often. Their sturdy texture and low moisture content make them excellent for cucumber kimchi.
• Persian cucumbers: A good alternative if Kirby cucumbers are unavailable. They tend to soften a little faster but still produce good results.
• English cucumbers: Use only as a last resort. Their higher water content and softer flesh can cause them to lose texture more quickly.

Tip: Avoid overripe cucumbers with large seeds or thick waxy skin. They won’t stay as crisp during fermentation.

How to Make Stuffed Cucumber Kimchi (Step-by-Step)

These photos are here to give you a handy visual guide. For exact measurements and detailed steps, head to the full recipe card at the bottom of the post.

1. Brine the Cucumbers:
Cut a cross slit in each cucumber, leaving one end attached. This gives you flaps to hold the filling.

I use a hot salt brine to help the salt penetrate quickly and keep the cucumbers extra crisp.

Brine the cucumbers for 1 hour with a hot salt solution and weight—this keeps them crisp.

2. Make the Filling:
My go-to filling is a mix of buchu (Korean chives), garlic, gochugaru, and fish sauce. If you don’t have buchu, scallions or even shredded radish work well.

3. Stuff the Cucumbers:
Gently open each cucumber and pack in the filling. Don’t forget to rub a little of the spicy mixture on the outside too. It adds flavor during fermentation.

Hyegyoung’s Tip: Wear kitchen gloves when mixing the filling, as gochugaru and garlic can irritate sensitive skin.

4. Pack and Ferment:
Place the stuffed cucumbers in a container and cover. Leave at room temperature for about a day before refrigerating. It gets better over time, developing a deep, tangy flavor while staying nice and crisp.

Tip: For storage, I prefer glass containers because they don’t absorb odors and are ideal for fermented foods.

Fresh vs Fermented Cucumber Kimchi

One of the best things about oi sobagi is that you can enjoy it at different stages.

Freshly made cucumber kimchi tastes bright, and lightly seasoned. After a day or two of fermentation, the flavors deepen and become tangier while the cucumbers remain pleasantly crunchy.

I usually enjoy some right away and save the rest for later. The slight fermentation adds complexity without sacrificing texture.

Just a quick note: Don’t confuse this with oi muchim, the spicy Korean cucumber salad. While they look similar, they’re totally different dishes. Oi kimchi (or Oi sobagi) is a fermented cucumber kimchi, while oi muchim is a quick, fresh side dish with no fermentation.

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