Time
30 minutes, plus 30 minutes marinatingYield
Serves 4 to 6Ingredients
Test Kitchen Techniques
Why This Recipe Works
No dish better captures the spark of Cantonese wok cooking than beef chow fun, the universally beloved stir-fry of supple beef; crisp vegetables (onion, bean sprouts, scallion greens); and smooth, delightfully chewy ho fun (wide, flat fresh rice noodles) tossed in a hot wok with a bare coat of deeply savory soy-based sauce. To start, we sliced flank steak thin across the grain to shorten its muscle fibers, which made it easier to chew. Briefly soaking it in a baking soda solution raised its pH, which prevented its proteins from seizing up during cooking. We then marinated the meat in an umami-rich mixture thickened with cornstarch to flavor it and coat the meat in a “barrier” that protected it from overcooking. Heating the wok “dry” and pouring the fat down its walls just before cooking allowed the metal to reach blistering-hot temperatures (upward of 700 degrees) without burning the oil. We drizzled the sauce down the wok’s superhot sides (rather than pouring it into the center with the food), which caused moisture to evaporate from it and deepened the sauce’s flavor. Batch-cooking the beef, vegetables, and noodles and constantly tossing the food in the wok helped drive off moisture, which encouraged the smoking fat, Maillardization, and caramelization that contribute to wok hei.
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