1, boiling water under the beans: the pot of water boiling, will wash the beans into the pot to cook, can avoid black beans. 2, put a little oil: in the cooking of beans in the water drops of cooking oil, so you can reduce the occurrence of oxidation reaction of the beans, but also to avoid the surface of the beans black. 3, open the lid to cook the beans: in the cooking, open the lid of the pot, open the fire to cook, it will let some oxidized components of the steam evaporation.

1, boiling water under the wool beans: boil the water in the pot, put the washed wool beans into the pot to cook, can avoid the blackening of wool beans.

2, put a little oil: in the cooking water of the beans drop the right amount of cooking oil, so you can reduce the occurrence of oxidation of the beans, but also to avoid the surface of the beans black.

3, open the lid to cook the beans: in the cooking, open the lid, open fire cooking, will let some oxidized components with the steam evaporation.