Sealed fresh-keeping method: put fresh cowpeas into plastic bags or fresh-keeping bags, tie the bag tightly and put them in the freezer. This storage method can be stored for 5 ~ 7 days, but after a long time, brown spots will gradually appear.
Spray preservation method: put cowpea in a perforated plastic bag and put it in the shade. Sprinkle a little water on it by hand every day. This fresh-keeping method takes a short time, can be kept fresh for 2 ~ 3 days, and is suitable for cowpea fresh-keeping at room temperature.
Blanching and freezing method: boil a pot of water and add a proper amount of salt to the water. Remove cowpea immediately after boiling and cool it with cold water. Put it in a fresh-keeping bag, squeeze out air as much as possible, tie the mouth of the bag tightly, and put it in the freezer of the refrigerator for preservation. The cowpea preserved in this way is still tender after one month and will not destroy its original flavor. But remember to dry the water on the surface, so that the frozen cowpeas will not stick together and it is more convenient to pick up.