1. Raw material treatment. Take 5 kg of soybeans, shell and screen them, wash them and soak them in a water tank for 4-5 hours in winter and 2.5-3 hours in summer. The soaking time must be well controlled and not too long, otherwise the pulp head will be lost and tofu will not be made. ? 20 ~ 30 grams of gypsum is used for each kilogram of soybeans.
2. Grinding beans and filtering pulp. After soaking the soybeans, take them out, and grind them according to the proportion of 6 kilograms of water per kilogram of soybeans. Pack the ground slurry in a bag (made of tofu cloth), pinch the mouth of the bag, and squeeze out the soybean milk by force. After the soybean milk is squeezed, it is possible to open the bag, add 3 kilograms of water, mix well and continue to squeeze the pulp. General 10 kg of soybean dregs 15 kg, about 60 kg of soybean milk. Don't let bean curd residue mix into soybean milk when squeezing pulp. ?
3. Boil the pulp and order it. Pour the squeezed raw pulp into a pot to boil, without covering the lid, and skim off the foam on the surface while cooking. The fire should be strong, but not too strong to prevent the soybean milk from overflowing after boiling. Add 20-50g of tofu fat, stir and dissolve, and cook soybean milk until the temperature reaches 90 ~110℃. Insufficient temperature or too long time will affect the quality of soybean milk. ?
Grind the burnt gypsum into powder, mix it into gypsum slurry with a bowl of clear water (about 0.5 kg), pour it into the soybean milk that has just been scooped out of the pot, and stir it gently with a spoon. After a few minutes, the soybean milk condenses into tofu flower. ?
4. make water tofu. Within about 15 minutes, the bean curd flower is gently scooped into a wooden tray (or other container) covered with cloth. When it is full, the bean curd flower is wrapped with cloth, covered with a board, and pressed for10 ~ 20 minutes, thus obtaining the water bean curd. ?
5. Make dried tofu. Spoon the bean curd flower into a wooden tray, wrap it with cloth, cover it with wooden boards, pile up stones, and press it to the full to make dried bean curd. General 10 kg soybean can make 25 kg dried bean curd.