Introduction

Gochu japchae sauce (고추잡채 양념) is the glossy, savory seasoning for gochu japchae, a Korean-Chinese stir-fry of finely shredded green peppers and pork. Despite the name, it usually contains no glass noodles – “japchae” originally means “mixed vegetables”. Served with soft kkotppang (flower-shaped buns), it is a favorite at Korean-Chinese restaurants alongside dishes like tangsuyuk. The sauce is simple: oyster sauce, soy sauce, garlic and a quick scallion oil.

Gochu Japchae Sauce at a Glance

What it is

• A savory oyster-soy stir-fry sauce for shredded peppers and pork

Main ingredients

• Oyster sauce, soy sauce, garlic, ginger, scallion oil, cooking wine, sesame oil, black pepper

Taste

• Salty-savory and smoky from the wok, with fresh pepper crunch

Main uses

• Gochu japchae with buns, gochu japchae rice bowls, other quick vegetable stir-fries

What is Gochu Japchae Sauce Made Of?

The base is oyster sauce with a little soy sauce for depth and color. The wok is first perfumed with scallion and garlic in oil, similar to pa-gireum, and the pork is marinated briefly in soy sauce and cooking wine. Common variations:

• Classic: green bell peppers and pork.
• Colorful: red and yellow bell peppers added for sweetness.
• With mushrooms or bamboo shoots: for extra texture.
• Spicy: a little chili oil or sliced hot chili.

What Does Gochu Japchae Sauce Taste Like?

It tastes savory, a bit sweet and deeply umami from the oyster sauce, with a toasty scallion aroma. Because the peppers are cooked fast over high heat, they stay crisp and slightly grassy-sweet. Wrapped in a soft, mild bun, the salty filling becomes perfectly balanced.

Popular Korean Dishes That Use Gochu Japchae Sauce

Gochu Japchae with Kkotppang

The restaurant classic – stuff the stir-fry into steamed or fried buns. Recipe below.

Gochu Japchae-bap

The stir-fry served over rice for a quick lunch.

Japchae with Glass Noodles

A different dish – the sweet soy noodle stir-fry. See our japchae sauce guide.

Easy Gochu Japchae Recipe (Serves 2–3)

Ingredients

• 8 oz (225 g) pork loin or tenderloin, cut into thin matchsticks
• 3 green bell peppers (or a mix of colors), cut into thin strips
• 1/2 onion, thinly sliced
• 2 tbsp neutral oil, 1 scallion (chopped) and 1 tbsp minced garlic
• 6–8 steamed buns (kkotppang or plain mantou), to serve

Pork marinade

• 1 tsp soy sauce, 1 tsp cooking wine, a pinch of black pepper and 1 tsp potato starch

Gochu japchae sauce

• 1 1/2 tbsp oyster sauce
• 1 tsp soy sauce
• 1 tsp cooking wine and 1/2 tsp sugar
• 1 tsp sesame oil and a pinch of black pepper

Instructions

1. Toss the pork with the marinade and let it sit for 10 minutes. Mix the sauce ingredients in a small bowl.
2. Heat the oil in a wok or large skillet over medium heat. Add the scallion and garlic and stir for 30 seconds until fragrant.
3. Turn the heat to high, add the pork and stir-fry for 2–3 minutes until it is no longer pink and cooked through (145°F / 63°C).
4. Add the onion and peppers and stir-fry for 1–2 minutes, keeping them crisp.
5. Pour in the sauce, toss for 30 seconds until everything is glossy, and serve right away with warm steamed buns.

Tip: Cut the pork and peppers to the same thin size so they cook evenly in seconds. Frozen steamed buns from Asian markets reheat in a steamer or microwave in a couple of minutes.

Where to Buy Gochu Japchae Sauce Ingredients

United States

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Amazon
Search oyster sauce on Amazon
Search Korean cooking wine on Amazon

H-Mart
Search steamed buns on H-Mart

Canada

Search oyster sauce on Amazon.ca

Europe

Search oyster sauce on Amazon.co.uk

How to Store Gochu Japchae Sauce

Mix the sauce fresh, or keep a double batch in a sealed jar in the fridge for up to 1 week. Opened oyster sauce should be refrigerated and used within several months. Leftover gochu japchae keeps in the fridge for 2 days; reheat quickly in a hot pan so the peppers don’t turn soft.

Gochu Japchae FAQ

Does gochu japchae have noodles?

Usually not. It is a stir-fry of shredded peppers and pork; “japchae” here means mixed vegetables.

Is gochu japchae spicy?

No. “Gochu” refers to peppers, and the classic version uses mild green bell peppers.

What is kkotppang?

A soft, flower-shaped bun, steamed or fried, served with gochu japchae at Korean-Chinese restaurants.

Can I use beef or chicken?

Yes. Thinly sliced beef or chicken works; cook chicken to 165°F (74°C).

Conclusion

Gochu japchae sauce is one of the fastest ways to bring Korean-Chinese restaurant flavor home: a spoon of oyster sauce, a little soy and a hot pan turn peppers and pork into a savory filling for soft buns in 15 minutes. For more about the sauce’s base, read our gul sauce guide.