What Chinese term refers to the smoky flavour imparted by a wok at high heat? Wok hei. The Cantonese term literally means “breath of the wok,” describing the concentrated aroma, char, and savoury depth produced when food is stir-fried rapidly in a very hot, seasoned wok.
Wok hei depends on more than simply cooking at a high temperature. Ingredients are usually added in small batches and tossed quickly so the wok does not lose too much heat. A gas flame or other powerful burner helps maintain the intense heat, while caramelization, Maillard browning, and small amounts of oil combustion contribute to the characteristic flavour. The wok’s seasoning and previously developed cooking surface can also influence the result.
The idea is especially associated with Cantonese cuisine and dishes such as beef chow fun and fried rice. It is not the same as deliberately burning food: excessive scorching creates bitterness rather than the balanced aroma cooks seek. Home cooks often approximate wok hei by preheating a carbon-steel wok, avoiding overcrowding, and cooking ingredients in batches.
A related mix-up is pronunciation. “Hei” follows Cantonese usage; Mandarin-based renderings may use “qi” or “chi.” The poetic English translation is widely used, but the term refers to a whole sensory quality—flavour, smell, and texture—not just smoke.