Quanzhou Konjac Tofu

Quanzhou Konjac Tofu

　　I. Resource Status: Konjac, also known as ghost yam, ghost head, flower stalk, snake head, Arisaema, or snake six valleys, with the full English name ElephantFoot or Konjac, is a perennial herbaceous plant of the genus Amorphophallus in the Araceae family. It has therapeutic effects on malaria, amenorrhea, boils, erysipelas, scalds, and can also help lower blood pressure, reduce fat, stimulate appetite, and prevent cancer. According to relevant records, there are approximately 130 wild varieties globally. It is widely distributed under tropical and subtropical sparse forests and is a semi-shade plant. Its underground flat spherical tubers, after being detoxified by heating in alkaline water, are edible. Since ancient times, many mountainous areas in China have had the custom of cultivating konjac. Quanzhou County is located in the northeast of the Guangxi Zhuang Autonomous Region, along the upper reaches of the Xiang River, between 110°7'–111°29' east longitude and 25°29'–26°23' north latitude. It falls within the subtropical humid monsoon climate zone, featuring distinct seasons and abundant rainfall. In mountainous regions above 600 meters in elevation, such as Dongshan Yao Autonomous Township, Jiaojian Yao Autonomous Township, Shitang, Caiwan, Xianshui, Shaoshui, and Daxijiang, many residents live in areas with cool climates and moderate forest density—ideal conditions for konjac growth. Legend has it that the practice of gathering wild konjac to make tofu has a history of over a thousand years, while the cultivation of konjac by local people dates back several hundred years.

　　II. Traditional Handmade Production Method:

　　(1) Production Method: Wash and peel fresh konjac, then quickly grind it into a paste (or rub it into a slurry) using your hands on a specially made grinding board (usually made of iron sheet about 20 cm long and 15 cm wide, pierced with numerous fine holes using thin nails, with the rough side facing up, mounted on a wooden frame for use. Some rural households use broken tiles to rub the paste). Add about 4 liters of grass ash water per kilogram of fresh konjac (half of the total water), stir well until fully mixed. After the paste is ground, add the remaining half of the grass ash water (nowadays, many find making grass ash water troublesome and often use edible alkali or raw lime water instead, adding only water during grinding, then mixing in the alkali water when the mixture is half-cooked in the pot. The amount of alkali added is 20–50 grams of white alkali per 1 kg of fresh konjac, or 5% raw lime water). Mix well and cook over high heat in a pot, stirring constantly until fully cooked. Quickly scoop it out and let it cool and solidify in a clean basin. Then, cut it into desired block shapes with a knife, add water, and boil vigorously until the tofu becomes soft, elastic, and has a shiny gray color. Remove it and rinse thoroughly in clean water to eliminate any astringency or excess alkali. At this point, it can be sold in the market or cooked and eaten at home.

　　(2) Production Key Points: First, ensure the paste is finely ground, avoiding any coarse grains or konjac chunks. Second, add water in appropriate amounts. Water should be added gradually and slowly—too much water will make it difficult to solidify, while too little reduces the yield. During grinding, about 4 liters of grass ash water can be added per kilogram of fresh konjac (normally, 1 kg of fresh konjac requires a total of 6–9 liters of water to produce 5–7 kg of tofu, as some water evaporates during cooking. If too little water is used during grinding, the paste may solidify into meat-red hard lumps that are difficult to dissolve in water. During tofu boiling, uncooked gel inside the lumps may cause poisoning and reduce yield. Therefore, the amount of water added during grinding should reach half of the total water volume). After the paste is ground, add the remaining half of the grass ash water, mix well, and cook in the pot.

　　(3) Precautions:

　　1. During grinding, cooking, and solidification, avoid contact with acids or fats. Utensils must not come into contact with alcohol or oil, which can neutralize the alkalinity and prevent solidification, or hydrolyze the glucomannan, causing failure.

　　2. Minimize the time konjac surfaces are exposed to air during processing. Peeled tubers should be soaked in water to reduce oxidation. Also, avoid contact with iron or copper utensils.

　　3. People who have consumed alcohol should not participate in making konjac tofu, as alcohol fumes can affect the solidification process.

　　4. When cooking konjac tofu, ensure all pieces are fully solidified and cooked through before removing from the pot. Pieces that are cooked outside but raw inside will soften upon cooling and lose elasticity.

　　5. The amount of alkali added during konjac tofu production should be appropriate. Too little alkali will prevent solidification, while too much will result in a dark color, strong alkali taste, and difficulty in removal, affecting product quality.

　　(4) Additional Notes: Nowadays, many consider making tofu purely from konjac paste and grass ash water to be troublesome, costly, and overly tough, with a gray-black color. The snow-white, soft, and shiny konjac tofu commonly sold in markets often includes additives such as rice flour, taro powder, soy flour, or other seasonings. This type of konjac tofu is not only visually appealing but also has a pleasant texture, making it popular among consumers. Since this introduction focuses on the traditional method, the specific preparation of these variations is not detailed here.

　　III. Ways to Eat Konjac Tofu in Quanzhou: Konjac tofu is one of the beloved local specialty dishes in Quanzhou. Common cooking methods include braising, stir-frying, stewing, and cold mixing. Dishes like spicy and sour konjac tofu, konjac tofu stir-fried with duck, cold mixed marinated konjac tofu, and red-braised konjac and carp are common accompaniments on the dining tables of Quanzhou residents. Among them, konjac tofu stir-fried with Wenqiao native duck is considered a unique highlight of Quanzhou cuisine.

　　Information Source: Quanzhou County People's Government Website