Easy Jjajangmyeon Recipe (짜장면, Korean Black Bean Noodles)

 In Korea, jjajangmyeon is the dish you order when you move into a new home. Boxes are everywhere, nobody wants to cook, and a few bowls of glossy black noodles show up at the door. 

For many Koreans, that's what a "moving day" tastes like. 

The first time I tried making it myself, the sauce came out bitter and a little harsh, and I couldn't figure out why. 

It turns out I skipped the one step that matters most: frying the black bean paste in oil first. Once I learned that, everything changed.

Korean jjajangmyeon with thick wheat noodles, glossy dark sauce, diced pork and vegetables, and cucumber matchsticks.

Mix the glossy sauce into the noodles just before eating.

So, What Is Jjajangmyeon?

Jjajangmyeon (짜장면) is a Korean-Chinese noodle dish: thick wheat noodles topped with a savory, slightly sweet sauce made from chunjang (a dark Korean fermented soybean-and-wheat paste, commonly called black bean paste), pork, and lots of onion. 

It was brought to Korea by Chinese immigrants and slowly became its own Korean comfort food. It's mild rather than spicy, which makes it a great starter dish if you're new to Korean flavors. 

You'll also see it in many K-dramas, usually with a character slurping it happily.

What You'll Need (Serves 3)

For the sauce:

  • 200 g pork shoulder or pork belly, diced small
  • 1 large onion, diced
  • 1/2 zucchini, diced
  • 1 medium potato, diced small
  • 4 tbsp chunjang (Korean black bean paste)
  • 3 tbsp neutral oil, for frying the paste
  • 1 tbsp sugar
  • Up to 1 tbsp soy sauce, adjusted to the saltiness of your chunjang
  • 1 cup (240 ml) water
  • 1 tbsp potato starch mixed with 2 tbsp water

For serving:

  • 3 servings thick wheat noodles, following the portion size on the package (about 300 g dried noodles; fresh noodles generally need a higher weight). 

  • Udon-style noodles also work
  • 1/2 cucumber, cut into thin matchsticks
Diced pork, onion, zucchini, potato, wheat noodles, cucumber, chunjang, sugar, soy sauce, starch slurry, water, and oil.

Prepare the diced vegetables and sauce ingredients before heating the pan.

Where to find chunjang:

Look for it at Korean grocery stores or online. The label usually says "chunjang" or "black bean sauce." It's different from Chinese black bean garlic sauce, so check the name.

Vegetarian/vegan note:

Skip the pork and use extra mushrooms, zucchini, or diced firm tofu instead. Most chunjang is plant-based, but check the label since a few brands add other ingredients.

Let's Cook

1. Fry the black bean paste.

Heat the oil in a pan over medium-low heat. Add the chunjang and stir for 2–3 minutes. 

Keep the heat gentle so it does not scorch; frying helps mellow the bitterness, and it's the one I missed on my first try. 

Scoop the paste out into a bowl, leaving the flavored oil in the pan. 

If your chunjang is labeled pre-fried, follow its package directions; this separate frying step may not be needed.

 Keep enough oil in the pan to cook the pork and vegetables.

Dark chunjang paste being stirred with a wooden spatula in oil in a stainless steel pan.

Fry ordinary chunjang gently, stirring, without scorching it.

2. Cook the pork and vegetables.

In the same pan, cook the pork over medium-high heat until browned. 

Add the onion, potato, and zucchini and stir-fry for 4–5 minutes until the onion turns slightly translucent.

3. Build the sauce.

Return the fried paste to the pan, add the sugar and a little of the soy sauce, and stir well. 

Adjust the remaining soy sauce after the pork is cooked, since chunjang brands vary in saltiness. 

Pour in the water, bring it to a gentle simmer, and cook for about 8–10 minutes, or longer as needed, until the potato is tender and the pork is fully cooked. 

Add a splash more water if it reduces too quickly.

4. Thicken it.

Stir the starch mixture again and drizzle it in slowly while stirring. 

Simmer for another minute or two until the sauce turns glossy and thick. 

You may not need all the slurry; stop when it coats the noodles comfortably.

Potato starch slurry being poured into simmering jjajangmyeon sauce with diced pork and vegetables.

Add the starch slurry gradually, stirring, until the sauce is glossy and thick.

5. Cook the noodles.

Boil the noodles according to the package directions and drain well. 

Rinse only if the package recommends it, then warm the noodles again if needed and serve promptly.

6. Serve.

Put noodles in a bowl, spoon a generous amount of sauce on top, and finish with cucumber. 

Then mix everything together before the first bite.

A Few Tips

  • Fry ordinary chunjang gently to mellow its sharpness. For pre-fried paste, follow the package instructions.

  • Cut the vegetables small and evenly so they cook together and the sauce stays smooth.
  • If the sauce tastes a bit sharp, add a little more sugar. 

  • It balances the salty paste.
  • Add the starch slowly and stir constantly so it doesn't clump.

  • The sauce thickens as it sits, so loosen it with a splash of water if it gets too thick.

Quick FAQ

Is jjajangmyeon spicy?

No. It's savory and a little sweet, so it's very kid-friendly. Some people add a pinch of chili flakes at the table.

What's the difference between jjajangmyeon and Chinese zhajiangmian?

They're related, but the Korean version uses a sweeter, darker, thicker sauce made with chunjang and lots of onion, and it usually has a glossier finish.

Leftovers

Refrigerate the sauce and noodles separately in shallow, covered containers within 2 hours of cooking (within 1 hour above 90°F / 32°C). Keep the fridge at 40°F (4°C) or below and use within 3 days. 

Reheat the sauce in a pan with a splash of water until it reaches 165°F (74°C), stirring thoroughly. Heat leftover noodles all the way through as well; cooking fresh noodles gives a better texture. 

You can freeze the sauce for up to a month for best quality, then thaw it in the fridge before reheating.

Images are AI-generated illustrations. Food-safety guidance: USDA leftover safety.

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