Wash the fresh cowpea with water.

Put cowpea in boiling water and cook for 2-3 minutes.

The cook cowpea is taken out, drained and cool.

Hang cowpea on a clean clothesline and keep a certain distance.

Let the air vent out and dry for 48 hours.

Pay attention to the weather forecast before preparing dried beans in advance, and it must be sunny in the next 4 ~ 5 days before you can prepare dried beans in advance. If it rains in the whole drying process, it will affect the quality of dried beans, and sometimes it will continue to damage them.

In fact, when the light is sufficient, it will be sunny in about 2 days. It is safer to choose a life with sunny days in 4 ~ 5 days.