5 kilograms of soybeans, 0.22 kilograms of gypsum, 40 to 45 kilograms of water.

2, yield

Each 50 kilograms of soybeans produced 22 plates of old tofu.

Old tofu practice

(1) point pulp (coagulation, point brain):

The boiling soybean milk, take two thirds of it in the bean curd flower tank, the remaining one third of it in the hot pulp poke, ready for brewing. Ground gypsum emulsion in the soybean paste bucket. When the temperature of soybean milk at 75 ℃, one-third of the cooked soybean milk and the bucket of gypsum emulsion at the same time poured into two-thirds of the soybean milk tofu flower tank, so that the soybean milk in the tank up and down evenly stirred. Then let stand for 3 minutes, the soybean milk is initially solidified as tofu flower.

(2) expansion of pulp (squatting brain, flowers):

point of pulp after the initial solidification of the bean curd flower, should continue to rest in the tank for 15 to 20 minutes, so that the soybean protein to further solidify the good. In winter, due to low temperatures, the expansion of pulp should also be added to keep warm. By expanding the pulp after the tofu flower, in the pouring of toughness, the finished product water retention is also better.

(3) spread cloth:

Take the old tofu box set 1, placed flat, then add tender tofu box set 1. The box set spread good tofu cloth, so that it is close to the inner wall of the box set, the bottom of the 4 bottom corners, 4 cloth corners should be exposed outside the four sides of the set, the cloth of the four edges of the four corners of the box set along the mouth of the cloth.

(4) pouring system:

To make the tofu to achieve a certain degree of oldness, must be poured before the part of the water contained in the tofu flower first excluded, exclude the water method is to use a bamboo sword will be in the tank of tofu flower into 6-8 cm square square, so that a part of the water - sub-division of leakage. Then use a large copper spoon to scoop the tofu flower into the box set to two box sets high along the mouth, and then the corners of the tofu wrap cloth turned up to cover the tofu flower, so that it naturally drained about 1 hour.

(5) finishing (bag):

The natural draining of the tofu flower, gradually to the bottom of the sinking, but due to the inconsistency of the drainage, there will be high and low. At this time should be uncovered in the tofu above the bag cloth, with a small copper spoon to scoop the surface of the tofu until basically flat. Then from the four sides of the box cover, according to the side of the cloth in order to tighten the tofu wrapping cloth to cover the good flat. After the cloth is tightened, the whole block of tofu will be wrapped in the tofu bag. At this point, the tofu has been basically shaped, you can remove the old tofu box set on the ring.

(6) pressing:

In order to make the tofu further drainage to achieve the required quality, but also after finishing, the tofu pressure tofu method of pressing, pressing about 30 minutes. When tofu is pressed, it forms a skin around it, making the product firm and flexible.

Old TofuOld tofu contains many functional ingredients. These functional ingredients are mainly linoleic acid, lecithin, isoflavones, choline, saponin, selenium, trypsin and so on. We eat is can be very good to help our body to promote digestion, especially for some have three high friends, often eat is can be very good control of blood sugar and blood fat.