This kind of wood leaf for making tofu is a wild plant called "Verbenaceae Tofu Wood", which belongs to a deciduous shrub. It has gray leaf stalks, green leaves and small white flowers, and grows in vegetable fields or roadside. It looks ugly, but the dark green leaves give off a different kind of fragrance, which is refreshing. Pick this kind of firewood leaf on the mountain, and you can find it by smelling its fragrance. You can not only pick leaves, but also break branches. This plant has a strong regeneration ability. The top of the tree will continue to grow in spring, summer and autumn. After picking and folding, it will sprout branches and spit leaves again soon.

Picking this firewood leaf seems easy, but in fact it is very particular. In the choice of firewood leaves, it is best to use firewood leaves with strong sunshine, which are thick, dark and juicy. On the contrary, leaves are thin and juicy. Young leaves are better, too old leaves have less juice, and tofu tastes bad. When picking leaves, you must also be careful not to break or break them. Once the leaves are broken, the tofu will have an unpleasant smell of grass.

Picked tofu firewood, its tender leaves should be picked and washed, and rubbed hard by hand to rub the juice in the leaves into a thick shape; Then pour the liquid into gauze and filter, and the filtrate will gradually melt into clear water. Then, add an appropriate amount of alkaline water made of straw or firewood ash to the gauze, and after standing for a few minutes, it will condense into a blue-green frozen substance as crystal clear as jade, but it will be placed on a dry surface for one night, and then cut into squares with a knife. The prepared chai tofu can be mixed with sugar or soy sauce and eaten cold, or cooked and fried with seasoning. It is fresh, fragrant and delicious.

According to the nutritional research on the branches and leaves of Tofu Chai, the researchers found that its protein content was 13.39%, pectin content was 17 ~ 19%, ethanol soluble matter (including pigment and sugar) was 22.36%, pure cellulose was 257 1%, and ash content was 8.