Name: Korean Cucumber Salad (Oi Muchim)
Prep time: 20 min
Total time: 50 min
Cuisine: Korean
Ingredients: 1 cucumber, thinly sliced; 1/4 onion, thinly sliced; 1 tablespoon Korean coarse salt or 1 teaspoon fine sea salt; 1 tablespoon gochugaru; 1 teaspoon white vinegar; 1 teaspoon sugar; 1 teaspoon minced garlic; 1 teaspoon toasted sesame seeds; 1/2 teaspoon gochujang (optional); A tiny drop of sesame oil (optional)

I make this Korean Cucumber Salad (Oi Muchim) when I want something crisp, cool, and full of bold flavor without spending much time in the kitchen. The cucumbers stay refreshing, the onion adds a little sharpness, and the chili-based dressing gives the whole dish a spicy, tangy kick that tastes especially good straight from the fridge.

Why You’ll Love This Recipe

I love this recipe because it comes together with simple ingredients and delivers big flavor with very little effort. I get a fresh crunch from the cucumber, a gentle bite from the onion, and a balanced mix of heat, tang, and savoriness in every bite. I also like that I can serve it with rice, grilled meat, or other Korean dishes, and it still feels light and refreshing.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

1 cucumber, thinly sliced

1/4 onion, thinly sliced

1 tablespoon Korean coarse salt, or 1 teaspoon fine sea salt

1 tablespoon gochugaru

1 teaspoon white vinegar

1 teaspoon sugar

1 teaspoon minced garlic

1 teaspoon toasted sesame seeds

1/2 teaspoon gochujang, optional

A tiny drop of sesame oil, optional

Directions

I start by washing the cucumber, trimming the ends, and slicing it thinly. Then I toss the slices with the salt in a bowl and let them rest for 15 minutes so they release extra moisture and stay pleasantly crisp.

While the cucumber rests, I slice the onion and mix together the gochugaru, vinegar, sugar, garlic, sesame seeds, optional gochujang, and optional sesame oil. This quick dressing gives the salad its signature spicy, tangy flavor.

Once the cucumber has rested, I rinse it under cold water, drain it well, and pat it dry. This step helps keep the seasoning balanced and prevents the salad from becoming too salty.

Next, I place the cucumber in a clean bowl, add the onion and the seasoning mixture, and toss everything gently until the slices are evenly coated.

For the best flavor and texture, I chill the salad for about 30 minutes before serving. I find that this resting time helps the cucumbers absorb the dressing while staying crisp and refreshing.

Servings and timing

I get 4 servings from this recipe.

Prep Time: 20 minutes

Cooking Time: 0 minutes

Total Time: 50 minutes

Calories: 25 kcal per serving

Variations

I sometimes add a little more gochujang when I want a deeper, richer heat. When I want the salad to taste brighter, I add a tiny extra splash of vinegar. I also like to use a little more sesame oil for a nuttier finish, but I keep it light so the cucumbers still taste fresh. For extra texture, I occasionally toss in a few more toasted sesame seeds right before serving.

Storage/Reheating

I store this salad in an airtight container in the refrigerator for up to 2 days. I think it tastes best on the first day, because the cucumbers stay crisper and fresher. I do not reheat this dish since I serve it chilled. If the salad releases a little liquid in the fridge, I just give it a gentle toss before serving again.

Related Recipes:

Seasoned Korean Acorn Jelly (Dotorimuk Muchim)

FAQs

Can I make this salad ahead of time?

I can make it a few hours ahead and keep it chilled in the refrigerator. I think it tastes even better after a short rest, but I prefer to eat it within a day for the best crunch.

Is gochujang necessary in this recipe?

I do not have to use gochujang because it is optional. I still get great flavor from the gochugaru, vinegar, garlic, and sesame seeds alone.

What kind of cucumber works best?

I like using a firm, fresh cucumber with minimal seeds. If I use a larger cucumber with more seeds, I sometimes remove some of the seedy center so the salad stays crisp.

How spicy is this salad?

I find that it has a moderate heat level from the gochugaru. I can make it milder by using less chili flakes, or I can make it hotter by adding a little more.

What do I serve with Korean cucumber salad?

I like serving it with steamed rice, grilled meats, Korean barbecue, or other small side dishes. It also works well as a refreshing contrast to richer main dishes.

Conclusion

I love how this Korean cucumber salad turns a few simple ingredients into a bright, spicy, and refreshing side dish. It is quick to prepare, easy to chill ahead, and versatile enough to serve with many meals. When I want something light, crunchy, and full of flavor, this is one of my favorite recipes to make.

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