
This classic Beijing zha jiang mian pairs chewy wheat noodles with a rich, savory pork and bean sauce layered with scallion, ginger, and warm spices. Crisp cucumber, carrot, and optional raw garlic add freshness and crunch, making every bowl deeply satisfying.
Separate the pork belly into two parts by cutting away the thick fatty skin layer from the leaner meat. Dice both portions into 1/2-inch pieces and keep them separate.
Place the lean pork in a bowl and mix in 2 tbsp water, 1 tbsp at a time, until the meat absorbs the liquid and looks slightly plumped. Set aside while you prepare the sauce base.
Heat the neutral oil in a wok over low heat. Add the scallion greens, ginger, star anise, bay leaves, cinnamon stick, and Sichuan peppercorns. Let the oil gently infuse for about 15 minutes, stirring occasionally, until fragrant and the scallions are lightly crisped but not burnt. Remove and discard the aromatics with a slotted spoon.
Increase the heat to medium-low and add the diced pork fat and skin. Cook for 5 to 6 minutes to render the fat, until the pieces are lightly golden around the edges. Add the lean pork and stir-fry for 1 minute, just until it turns opaque.
Reduce the heat to low. Stir in the Shaoxing wine, dark soy sauce, sweet bean sauce, ground bean sauce, 1 cup water, and the scallion whites. Add the sugar and salt if using, then mix until the sauce is evenly combined.
Cover the wok, raise the heat to medium, and simmer the sauce for 10 minutes so the pork softens and the flavors meld.
Uncover and increase the heat to medium-high. Stir frequently as the sauce bubbles and thickens. Cook for 8 to 12 minutes, until glossy and thick enough to coat noodles without becoming dry. Remove from the heat.
If not serving right away, cool the sauce and refrigerate it in a clean container for up to 10 days. Keep a thin layer of fat on top to help preserve it, and always use a clean spoon when serving.
Bring a large pot of water to a boil and cook the noodles according to the package directions. If using fresh noodles, cook them in plenty of water and add a small splash of cold water each time the pot returns to a full boil to keep the noodles springy rather than gummy.
While the noodles cook, prepare the toppings: julienne the carrot and cucumber and mince the garlic if using. Divide the cooked noodles among bowls, spoon over the fried sauce a little at a time, and toss until evenly coated. Top with carrot, cucumber, and garlic, then serve immediately.
Sweet bean sauce and ground bean sauce are both important for authentic flavor, but if needed you can use more sweet bean sauce in place of part of the ground bean sauce. Keep the heat moderate while reducing the sauce so the bean pastes do not scorch. The sauce can be made ahead and reheated gently before serving.




