1. Remove the old skin from the old corn you bought, leaving two layers of tender skin inside, and then soak it in water for about half an hour.

2. Remove the silk from the old corn, wrap it with clean gauze, put it in the pot with the old corn, and then add an appropriate amount of water. The amount of water must not exceed the old corn.

3. After adding water, bring to a boil over high heat. Then add a small amount of salt to the pot and cook again. The cooked old corn will have a slight sweetness and a great taste throughout its life. Friends who like to drink milk can also add a small amount of milk or milk powder, so that the cooked old corn will be more fragrant and tender, with a strong milky flavor.

4. When cooking old corn, you can add a small amount of baking soda to the water. Baking soda is an alkaline ingredient that stimulates the niacin activity in old corn, making this substance more easily collected by the body. Take out the cooked old corn and cut into small pieces. You can also stew it with ribs, or remove the corn kernels and make pine nut corn with pine nuts, carrots and other ingredients.