1, soybean to maintain the bright green color, must be boiling water under the pot. Because cool water under the pot then will make the chlorophyll of the wool bean decomposition more, the color becomes yellow. Cooking with a few drops of oil can also keep the green color of the beans.

2, before cooking the beans must be a one-time addition of water, remember to add water in the middle, this will extend the cooking time of the beans, so that the chlorophyll in the beans to destroy more, the color will turn yellow.

3, very important point is to cook the beans must not cover the lid. Because the lid will raise the temperature of the pot, so that the chlorophyll decomposition faster, the beans will quickly turn yellow. So when you cook the beans to keep the medium heat boiling state can be, do not cover the lid simmering.

4, soybean cooking time can not be too long, after the water boiled boil about 10 minutes can be, cooking time is too long, chlorophyll will be completely decomposed, the color will certainly be yellow.