When it comes to green bean soup, I am sure that many families must have many drinks in the hot summer. However, we found a strange phenomenon, which is a friend living in the north. Green bean soup with green beans is usually red in color, it is almost the same as red bean soup. Why is the cooked green bean soup red? Here is the reason! Drinking green bean soup in summer to solve summer thirst and promote appetite, teach you 1 cook clear green bean soup.

Green bean soup cooked, why red? Cook how to change the green color?

Green peas oxidize in the air, cooked soup can be red. Just out of the green pea soup is often a normal green color, but because of the time is too long, it will turn red, which is normal. The red pea skin dissolves phenolics for the reason that by producing oxidative polymerization, open lid green peas are more likely to be viable, and there are a number of such cases.

Tap water containing alkali is red, the soup can be red. The fact that green pea soup is made, it does not disconnect time and has to do with the water used in the beans we boil. Commonly used drinking water for life are tap water and purified water, if used to boil green bean soup with ionized water, then it is also the greenest color and it can remain unchanged for a long time. If tap water is used for boiling, the color of the soup changes very fast. The color will slowly deepen over time as the cooked soup passes through the air. Tap water in the north tends to be alkaline, so the color change is more pronounced.

Soup cooking may be red with iron utensils used in cooking green bean soup. Usually cooked green bean soup, but also affect the color of green bean soup. In the production process, if often stirred with an iron spoon, it will cause the green bean soup to change, the activity present in the green beans, the presence of flavonoids and metal ions in the skin of green beans may work. It will become darker in color, which in turn leads to cooked green bean soup or black in color.

When you use green bean soup, try not to use an iron pan and don't use an iron spoon while stirring. Whether it's red or green soup, it's got nutrients galore. However, in comparison, green green bean soup is more favorable than red green bean soup. So, how can you make green bean soup will change green color?

Teach you 1 cooked green green bean soup

First, put the green beans in a pot with cold water and then heat the water. During the cooking process, if the water is not enough, do not add cold water, continue to heat the water, so boiling, the soup is green.

Secondly, when you cook beans, you should pay attention to cooking beans to cook, which is green beans boiling, so this is not only delicious, and you do not have to worry about the soup will be red, nutrition is red, and the nutritional value is also higher. When you use porridge you like to put some edible base which can easily cause a reaction and the soup will turn red. Although this will allow the beans to cook quickly, it is advisable not to lose the nutrition in the beans. In addition, it is best to cover the soup when covered. Because it is afraid of the cooking head, many people open the lid directly during the cooking process in order to keep an eye on its form. Polyphenol substances of the skin of green beans come into contact with oxygen, and if oxidation is oxidized to quinone, the soup will deepen. When you cook, you can open a small fire, cover the lid, so you can better avoid oxidation reaction.

Finally, put the green beans after the water. Most families are making green bean soup and they will be combining both the green beans and the water at the same time, the correct way to do this is to bring the boil to a boil and then use a low heat into the green beans. This looks like cooked soup color is the best. The. At this point, the dissolved substance is the active ingredient in the skin of the bean, which is not only the strongest heat and heat capacity, but also oxidation is not easy.