Name: Oiji (Salt-Cured Cucumber)
Prep time: 35 min
Cook time: 5 min
Total time: 72 h 40 min
Yield: Makes about 20 cured cucumbers, enough for 8 to 10 banchan servings
Cuisine: Korean
Ingredients: 20 small Korean cucumbers or Kirby cucumbers, about 1.8kg total; 8 cups water; 1 cup coarse sea salt or kosher salt, about 240g; 1/4 cup soju, optional; For one dressed batch: 4 cured oiji cucumbers; 2 cups cold water, for soaking; 1 tablespoon finely chopped scallion; 1 small garlic clove, minced; 1 teaspoon gochugaru (Korean chili flakes); 1 teaspoon toasted sesame oil; 1 teaspoon toasted sesame seeds; 1/2 teaspoon sugar, optional

Question 1

How long does oiji take to cure?

Accepted Answer

Oiji takes 2 to 3 days at cool room temperature before refrigeration. The Korean salt-cured cucumbers are ready when they turn olive yellow, wrinkle slightly, and feel firm when pinched. In a hot kitchen, check after 36 hours; in a cooler kitchen, curing may take 4 days.

Question 2

What kind of cucumbers should I use for oiji?

Accepted Answer

Use 20 small Korean cucumbers or Kirby cucumbers, about 1.8 kilograms total. Choose firm cucumbers no thicker than 1 inch across when possible. Large watery cucumbers cure unevenly and often soften in the center, while small firm cucumbers stay crisp after brining and soaking.

Question 3

Why did my oiji cucumbers turn soft?

Accepted Answer

Oiji cucumbers turn soft when the brine is too weak, the cucumbers float above the liquid, or large watery cucumbers cure unevenly. Use 8 cups water with 1 cup coarse sea salt or kosher salt, keep every cucumber weighted under the brine, and discard any batch with mold, bad smell, or slippery texture.

Question 4

Do I need an onggi crock to make oiji?

Accepted Answer

You do not need an onggi crock to make oiji. Use a 2-liter heatproof glass jar, onggi crock, or food-safe container that can hold hot brine. The important equipment is a clean fermentation weight, small plate, or brine-filled zipper bag that keeps every cucumber fully submerged.

Question 5

How long should I soak oiji before dressing it?

Accepted Answer

Soak sliced oiji in 2 cups cold water for 10 to 15 minutes before dressing. Taste one cucumber coin after soaking; it should be pleasantly salty, not harsh. Drain and squeeze the slices hard by hand until no water drips freely, which keeps oiji-muchim crisp instead of watery.

Question 6

How long does oiji last in the refrigerator?

Accepted Answer

Whole cured oiji keeps for 3 to 4 weeks in the refrigerator when the cucumbers stay fully submerged in clear brine. Dress only what you will eat within 2 days. Once oiji is sliced, soaked, and seasoned with sesame oil, gochugaru, scallion, and garlic, it loses its snap faster.

Culinary Explorer

Oiji (Salt-Cured Cucumber)

Ingredients

small Korean cucumbers or Kirby cucumbers

water

coarse sea salt or kosher salt

Where cooking meets culture.

Ingredient	Quantity
small Korean cucumbers or Kirby cucumbers	20, about 1.8kg total
water	8 cups
coarse sea salt or kosher salt	1 cup (about 240g)