The reason restaurant stir-fry tastes different from home stir-fry is heat, restaurant woks reach temperatures that home gas ranges cannot, which produces the slightly charred, intensely flavored result called wok hei. You cannot replicate wok hei at home, but you can get significantly closer than most home stir-fry by using the highest heat your pan can produce and making sure everything going into it is completely dry.
The Pan and the Heat
A cast iron skillet or a large stainless steel skillet heated over the highest heat your stove produces for 3 to 4 minutes before anything goes in is the closest home approximation of wok performance. Do not use non-stick, it cannot withstand the heat required. Add a high smoke point oil, avocado, peanut, or vegetable, and let it heat until it shimmers and nearly smokes before adding the first ingredient.
The Dry Ingredient Rule
Any moisture on the vegetables or protein immediately lowers the pan temperature when it hits, producing steam rather than sear. Pat the protein completely dry before cooking. Dry the vegetables after washing. Cooking in batches rather than crowding the pan maintains the heat that produces browning. A crowded pan produces steamed, soggy vegetables, the result that makes people think they cannot make good stir-fry at home.
The Sauce and the Sequence
Make the sauce before anything goes into the pan: soy sauce, oyster sauce, sesame oil, a teaspoon of cornstarch dissolved in water, and any chili or ginger you want. Protein cooks first, removed from the pan. Firm vegetables cook next. Soft vegetables and aromatics last. Return protein to the pan, pour sauce around the edges not over the food, the hot pan edge caramelizes it instantly. Toss everything for 60 seconds and serve immediately over rice or noodles. For the all-purpose stir-fry sauce recipe, the stir-fry sauce guide covers the base recipe. Cast iron skillets at a range of price points are on Amazon. The Meal Prep Guide ($17) covers prepping stir-fry components ahead of time.
