Stir frying
A Chinese cooking technique using high heat and a wok.
Stir frying is a method where food is cooked quickly in a wok with a small amount of very hot oil, using constant stirring or tossing. It began in China and later spread across Asia and the West, bearing some resemblance to Western sautéing. The wok may have been used as early as the Han dynasty, but initially for drying grain rather than cooking. It took its modern form during the Ming dynasty, enabling fast cooking in hot oil. Evidence shows metal woks and stir-frying were already common in the Song dynasty, and the technique appears in the 6th-century text *Qimin Yaoshu*. Stir frying is often recommended as a healthy, appealing way to cook vegetables, meats, and fish, as long as calorie content is controlled. The English term "stir fry" was introduced by Buwei Yang Chao in her 1945 cookbook *How to Cook and Eat in Chinese*, translating the Chinese word *chǎo*. In English, "stir-fry" is used as a noun, but in Chinese, *chǎo* is only a verb or adjective.
Two main techniques exist: *chao* and *bao*. Both use high heat, but *chao* involves adding a liquid, resulting in softer ingredients, while *bao* produces crisper food due to the Maillard reaction. In *chao*, the wok is heated until nearly smoking, then a small amount of oil is added down the side—a traditional phrase is "hot wok, cold oil." Dry seasonings like ginger, garlic, or scallions are tossed until fragrant, followed by ingredients that take longest to cook, such as meat or tofu. Near the end, sauces and thickeners like cornstarch or arrowroot may be added. A single vegetable can be stir-fried alone, or multiple ingredients are combined; they should be cut to roughly the same size and shape.
*Wok hei* (Cantonese for "wok thermal radiation," often translated poetically as "breath of the wok") refers to the flavor, taste, and essence a hot wok gives to food during stir-frying. This concept is most common in Cantonese cuisine and may not be recognized in other Chinese culinary traditions. To achieve it, food is cooked in a seasoned wok over high flame with rapid stirring and tossing. The flavor comes from caramelization, Maillard reactions, and partial combustion of oil at temperatures above 200 °C, as well as residues from previous cooking. *Wok hei* also affects texture and smell.
The *bao* technique, meaning "pop" or "explosion," was typical of Shandong cuisine in the 18th and 19th centuries. The wok is heated until dull red, then oil, seasonings, and meats are added quickly. Food is tossed continuously, with brief pauses to add broths, vegetables, or more seasonings. Minimal seasoning is used to highlight natural tastes. *Bao* works best for small amounts of food that cook fast, so juices stay inside; meat is often coated with egg white or starch. Once cooked, the food is ladled out, and the wok is rinsed immediately to prevent charring. A larger amount of high-smoke-point oil is common, and ingredients are cut into smaller pieces.
- origin
- China
- first_written_mention_as_cooking_techniq
- 6th-century AD Qimin Yaoshu
Lore & Background
Stir frying is a cooking technique where ingredients are fried in a small quantity of very hot oil while being continuously stirred or tossed, typically in a wok. The technique originated in China and later spread to other parts of Asia and the West. The wok itself may have been used as early as the Han dynasty, though initially for drying grain rather than cooking. It was not until the Ming dynasty that the wok developed its modern shape, enabling quick cooking in hot oil. However, metal woks and stir-frying of dishes were already popular during the Song dynasty, and the technique is mentioned in the sixth-century agricultural manual *Qimin Yaoshu*. The English term "stir fry" was introduced in 1945 by Buwei Yang Chao as a translation of the Chinese word *chǎo*.
There are two primary stir-frying techniques: *chao* and *bao*. Both use high heat, but *chao* involves adding a liquid, resulting in softer ingredients, while *bao* produces crispier food due to the Maillard reaction. In *chao*, the wok is heated until nearly smoking, then a small amount of oil is added, followed by dry seasonings like ginger or garlic. Ingredients are added in order of cooking time, with meat or tofu first, and sauces or thickeners near the end. The *bao* technique, typical of Shandong cuisine, uses an even higher flame, heating the wok to a dull red glow. Oil, seasonings, and meats are added rapidly, with continuous tossing to seal in juices, often using egg white or starch coatings on meat. A key concept in Cantonese cuisine is *wok hei*, the flavour and essence imparted by a hot wok during stir-frying, resulting from caramelization, Maillard reactions, and partial oil combustion at very high temperatures. The wok’s seasoned metal also contributes to this taste from previous cooking sessions.
Reader's Guide
Stir frying became increasingly popular in the late Ming dynasty, in part because wood and charcoal for stoves were becoming expensive near urban centers, and stir-frying could cook food quickly without wasting fuel. The increasingly commercial nature of city life in the late Ming and Qing periods also favored speedy methods. By the late Qing, most Chinese kitchens were equipped with a wok range convenient for stir-frying. In the West, stir frying spread from Chinese family and restaurant kitchens into general use, particularly noted in the health-conscious 1970s. Two primary techniques exist: chao, which adds a liquid and yields softer ingredients, and bao, which uses higher heat and produces crispier results due to the Maillard reaction. Wok hei, the 'breath of the wok,' is a flavor imparted by a hot wok during stir-frying, most encountered in Cantonese cuisine.
Did You Know?
- Wok hei, meaning 'breath of the wok,' is a flavor imparted by a hot wok during stir-frying, most common in Cantonese cuisine.
- The bao technique involves heating the wok to a dull red glow before adding oil and ingredients.
- Stir frying was not as important as boiling or steaming historically, because oil was expensive.
Frequently Asked Questions
Who is Stir frying?
Stir frying is a cooking method that originated in China, in which ingredients are quickly cooked in a wok using a small amount of very hot oil while being constantly tossed. Over the centuries it spread throughout Asia and eventually into Western kitchens.
What are Stir frying's powers/role?
Its signature move is combining extreme heat, minimal oil, and rapid stirring so that food cooks in mere seconds rather than minutes. In Western culinary terms it plays a role very similar to sautéing, just at a higher intensity.
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