1. First pick the walnuts from the tree and put them in the yard for a while. Then push it away to dry until the green skin outside the walnut quickly loses water.

2. Peel off the green skin outside by hand with a knife;

Compared with dried walnuts, the contents of essential amino acids and other amino acids in fresh walnuts are higher than those in dried walnuts stored for a period of time, indicating that high temperature, light and ventilation have greatly accelerated the loss of nutrients in dried walnuts.

Extended data:

Main types of walnuts:

Walnut's hometown is Iran in the west of Asia, which was brought back to China by Zhang Qian in the Han Dynasty after his mission to the western regions.

1, according to the origin, there are Chencang walnut, Yangping walnut and wild walnut;

2. According to maturity classification, there are summer walnuts and autumn walnuts;

3. According to the smoothness of the shell, there are light walnuts and hemp walnuts;

4. According to the thickness of the shell, there are two kinds of thin-shell walnuts and thick-shell walnuts.

Baidu encyclopedia-walnut