Rice & Noodles
Jjajangmyeon (Black Bean Noodles)
Prep
15 min
Cook
25 min
Servings
3
Steps
- 1
Heat the oil in a wok or deep pan and fry the chunjang on its own for 2-3 minutes — this step removes the raw bitterness and is not optional.
- 2
Remove the fried chunjang and set aside.
- 3
In the same pan, brown the pork until rendered and slightly crisp at the edges.
- 4
Add the onion, potato, and zucchini, and stir-fry a few minutes.
- 5
Pour in the water or stock and simmer until the potato is tender, about 10 minutes.
- 6
Stir the fried chunjang back in along with the sugar.
- 7
Add the cornstarch slurry and stir until the sauce thickens and turns glossy.
- 8
Finish with sesame oil.
- 9
Boil the noodles separately, drain, and top with the sauce and cucumber.
Did you know — Korean culture
Jjajangmyeon isn't from China, even though it's built on a Chinese sauce. It was developed in Incheon's Chinatown around 1905 by Chinese immigrant laborers and restaurants like Gonghwachun, who thickened and sweetened Shandong-style black bean sauce for Korean tastes. The result became so thoroughly its own dish that most Korean-Chinese restaurants today serve versions you won't find in China at all.
Frying the chunjang before anything else goes into the pan isn't a stylistic choice — raw black bean paste tastes bitter and flat, and a couple of minutes in hot oil is what turns it into the deep, slightly sweet base the whole dish depends on. Skip this step and no amount of sugar afterward fully fixes it.
Jjajangmyeon isn't actually Chinese, despite the sauce's origins. It was developed around 1905 in Incheon's Chinatown by Chinese immigrant laborers and restaurants like Gonghwachun, who thickened and sweetened Shandong-style black bean sauce specifically for Korean tastes. The dish became so distinctly its own thing that most versions served in Korea today don't exist in China at all — it's Korean-Chinese fusion food with a Korean identity, not an import.
The cornstarch slurry at the end is what gives the sauce its glossy cling instead of a watery puddle at the bottom of the bowl. Add it too early and it won't thicken properly against unreduced liquid; add it at the very end, off heat is fine, and stir until you see it turn glossy rather than cloudy.
Troubleshooting
Sauce tastes bitter or flat? The chunjang almost certainly wasn't fried long enough on its own before the rest of the ingredients went in.
Sauce won't thicken? Make sure the slurry is fully dissolved (no dry lumps) before adding it, and give it a minute of active simmering afterward — it thickens on heat, not immediately on contact.
Noodles clumping in the bowl? Toss them with the sauce immediately after draining — noodles sitting bare for even a couple minutes stick together fast.