Green bean soup is green after cooking methods are: cover the pot, with purified water, lemon juice (vinegar), boiling water.

1, cover the pot with a lid

Mung beans are very easy to oxidize when they come into contact with oxygen and continue to polymerize into a darker color. Therefore, in the simmering mung bean soup should be covered with a lid to minimize the contact area of mung beans and oxygen to avoid oxidation.

2, with pure water

Different water quality simmered green bean soup color is different. Distilled water is the greenest color, and long-term unchanged. Followed by pure water and mineral water. Tap water simmering mung bean soup color change fastest, in contact with the air almost every minute are significantly darker, and soon turned red. Therefore, simmering green bean soup is best to use pure water.

3, lemon juice (vinegar)

Phosphorus and alkalinity can also greatly affect the effect of soup color change. After adding vinegar or lemon juice to tap water, the color of the simmering green bean soup changes very little.

4, boiling water to cook

Cooking green bean soup, first boil water, and then into the green beans, continue to cook on low heat for 8-10 minutes after pouring out the green bean soup. At this time the color of the soup is turquoise, the lowest degree of oxidation.

Green bean soup practice:

One, rock sugar green bean soup

Materials prepared: green beans, rock sugar, water and so on.

1, green beans cleaned, soaked in water for an hour.

2, start a pot of boiling water, put the green beans, large fire boil, change the small fire to cook forty minutes.

3, add rock sugar boiled, scooped into a bowl, cooled to drink.

Two, rock sugar lily green bean soup

Materials prepared: fresh lily, green beans, rock sugar, water and so on.

1, green beans washed, add water soaked for two hours.

2, fresh lily break into petals, wash and spare.

3, start a pot of boiling water, high heat, add green beans, cook for 1 hour.

4, put the rock sugar to boil, then add the lily pieces, cook for 5 minutes.

5, turn off the fire, soup in a bowl to cool or put in the refrigerator to chill before drinking.