Ingredients: tender cowpea 1 000g, non-iodized salt 30g, high-alcohol liquor1spoon.

Steps:

1, clean the tender cowpea, use filtered purified water for the last time, take it out and drain it.

2. Sprinkle salt and rub it, almost 1000 grams of cowpea with 30 grams of salt, and let it stand for 1-2 hours.

3. After 1-2 hours of salting, cowpea becomes soft and dark.

4. Put cowpea into a clean empty mineral water bottle, and pour in the salt water that has stood still. Add cold boiled water or mineral water to the insufficient part (the amount of water has not exceeded cowpea).

5. Finally, add a little high-alcohol to seal, and the taste of sour beans will be more crisp.

6, the bottle cap can be screwed upside down, waiting for the beans to turn sour.

The color will turn yellow in 7, 3-5 days, and it will be more sour after a long time.

8. Finished products.