Step 1

Cook the noodles according to package instructions until al dente or 1 minute past al dente stage.

Step 2

Meanwhile, in a serving bowl, add the light soy sauce, Shanghai rice vinegar, chili oil, sugar, Sichuan peppercorn powder, sesame oil, dark soy sauce, salt, MSG (if using), and garlic.

Step 3

Add the noodles, noodle cooking water, scallion, and cucumber. Toss everything together and serve. If the noodles look dry, add a bit more of the cooking water.