Why does the egg custard turn green after steaming for a long time

Steaming egg custard for too long or too hot can cause it to turn green. Generally steamed egg custard.

The time depends on the pot you are using, it takes about 10 to 15 minutes if it is a steamer, 3 5 minutes if it is a microwave oven on medium heat, and about 15 minutes on low heat.

Steamed egg custard can not be used too high heat, generally medium heat or low heat can be, be sure to steam the egg custard, otherwise the steamed egg custard will appear in various conditions, can not be eaten. When making egg custard, you must choose fresh eggs without cracks, and the water in which you add eggs is preferably warm boiled water, and the temperature can be controlled at 40 degrees.

It is best to use medium heat for steamed egg custard, so that the steamed egg custard tastes better. Before steaming the egg custard, cover with plastic wrap.

or lid to prevent steam from entering the custard and making it old.

After the steamed egg custard turns green, it is caused by too much fire or too long time, this situation does not affect the consumption, you can eat, but you can not give it to the baby, adults can eat, of course, to control the amount, this egg custard is best to eat less, so as not to have gastrointestinal discomfort.

The egg custard is steamed for about eight minutes, which is optimal. The long steaming time and the green color is due to the change in the nutrients in the egg custard, so it turns green.

After the eggs are steamed for a long time, some nutrients will oxidize into oxides, which is a waste of nutrients and is not good for the body.

In general, there are many reasons why steamed eggs are green, it may be that they have been steamed for too long, or the eggs have gone bad, or they may be too big, etc. Let's take a closer look!

What causes steamed eggs to turn blue.

Steaming eggs for too long or too much heat will cause them to turn green.

The analysis is as follows: 1. The protein in egg whites contains sulfur. During the denaturation process, sulfur combines with hydrogen to produce hydrogen sulfide, a toxic gas that also tastes like "rotten eggs".

2. Because hydrogen sulfide is heavier than oxygen and helium, hydrogen sulfide usually exists in wells and holes, which is toxic, flammable, explosive, and corrosive. But don't worry, the hydrogen sulfide in eggs is very small and poses no health risk.

3. When you boil eggs, the heat comes in from the outside in. This is important because the solubility of egg whites decreases as the temperature increases, so hydrogen sulfide is forced into the yolk.

4. Egg yolk contains iron, which will be released from the yolk high phosphoprotein after full heating. At the intersection of egg yolk and egg white, iron ions react with hydrogen sulfide to form iron sulfide. This is a grayish-green substance, so the yolk has a pale green layer.

The longer you cook it, the more iron sulfide will be, and the greener the yolk will be.

Can you eat steamed eggs when they are blue.

Normal eggs are yellow and will not turn green when steamed, so it is best not to eat steamed eggs when they turn green.

Steamed eggs, as the name suggests, are put into the microwave oven to steam, steamed eggs can be used as private recipes, can also be used as a recipe for replenishing deficiency and nourishing the body, spleen appetizing recipes, malnutrition recipes and anemia recipes, the taste is salty and fresh, rich in nutritional value, and simple to operate.

What are the points of steamed eggs.

1. Add water: An egg can add 1-3 parts of water with the same weight as the egg, add 1 part of water egg custard to be harder, and add 3 parts of water egg custard to make it softer. Choose appropriately according to your needs;

2. Water type and temperature: add warm boiled water of about 30 degrees when adding water (do not use tap water);

3. Other auxiliary materials: appropriate amount of salt, chopped green onion suitable for your taste;

4. Stir thoroughly: Stir the eggs and water with chopsticks or whisk with one hand, and rotate the container with the other hand until 1 cm high bubbles appear on the egg liquid;

5. Put enough water in the steamer, put the beaten egg liquid in the steamer** steam, remember the time after the steamer water is boiled, and steam for another 10 minutes after boiling;

6. Take out the egg custard from the steamer, add vinegar, sesame oil, soy sauce, chicken essence and other seasonings according to the taste you need, and serve.

The green phenomenon that occurs after steaming eggs is related to the long time of steaming eggs, and the second is the reason why lime water is put in the steamed eggs, and the green steamed eggs that appear for these two reasons will not produce toxic substances and can be eaten with confidence, but if the steamed eggs are steamed for a long time and are green and have a peculiar smell, don't eat them, this may be the steamed eggs steamed out of bad eggs, and eating them is harmful to health.

It takes a few minutes for steamed eggs to get cooked.

It will be cooked in 7-10 minutes.

The time of steaming eggs should not be too long, otherwise the color of steamed eggs will not only change, the taste will also become old, the shape will also appear honeycomb, it is not beautiful to eat and not delicious, it is best to use warm water to mix the steamed egg liquid, steam it for about 7 minutes on the fire, and take it out to avoid water vapor dripping into it after turning off the fire, if the steamed egg liquid is more, it can be appropriately extended for 2-3 minutes.

How much water do you need to steam an egg.

It is advisable to put the same water as the eggs.

Generally, steaming an egg is most suitable for single working people, but the specific amount of water must be grasped, because the egg liquid is too little, and the amount of water can not be too small, otherwise the steamed egg will become a boiled egg, and if you put too much water, it is easy to appear thin water eggs, resulting in egg custard is not formed, the best ratio of steamed eggs is 1:1 for water and eggs, and an egg is about 40 grams, and 40 ml of water is about the same.

Steaming the custard for too long or too much heat will cause the custard to turn green, and similar situations can also occur if it is left in the pot for a long time after steaming. But it doesn't affect the consumption, and it's not a problem with eggs. It is recommended that egg custard should be removed from the pot and eaten immediately after steaming.

1 can eat. The green phenomenon that occurs after steaming eggs is related to the long time of steaming eggs, and the second is the reason why lime water is put in the steamed eggs, and the green steamed eggs that appear for these two reasons will not produce toxic substances and can be eaten with confidence, but if the steamed eggs are steamed for a long time and are green and have a peculiar smell, don't eat them, this may be the steamed eggs steamed out of bad eggs, and eating them is harmful to health.

2. It is harmless to eat a small amount correctly.

Lime water, that is, calcium hydroxide solution, is a kind of food added ruler powder, can be used as a food curing agent, buffer or neutralizing agent, put it into the steamed egg, can promote the coagulation of the egg liquid, increase the smooth taste of the steamed egg, and let the steamed egg with a faint special fragrance, but it may make the original light yellow steamed egg, Lingner's become a little gray-green, this is a normal phenomenon, but this ingredient is harmless to the human body when used correctly and in small amounts, and can also play a role in clearing heat and removing fire, repelling insects and supplementing calcium.

1. When pouring lime water, do not use lime water at the bottom, the lime content of this part of the lime water is too high, which is very easy to affect the taste, resulting in a very hard taste.

2. Under normal circumstances, the color of the steamed eggs should be gray, if the concentration of clarified lime water is higher, the steamed egg custard may also turn gray-green, which is normal.

2. The quicklime used on the construction site cannot be used to make lime steamed eggs, because the quicklime contains harmful substances such as heavy metals that are harmful to the body, which is different from the composition of edible lime.

It will be cooked in 37-10 minutes.

The time of steaming eggs should not be too long, otherwise the color of steamed eggs will not only change, the taste will also become old, the shape will also appear honeycomb, it is not beautiful to eat and not delicious, it is best to use warm water to mix the steamed egg liquid, steam it for about 7 minutes on the fire, and take it out to avoid water vapor dripping into it after turning off the fire, if the steamed egg liquid is more, it can be appropriately extended for 2-3 minutes.

4. Put the same water as the eggs.

Generally, steaming an egg is most suitable for single working people, but the specific amount of water must be grasped, because the egg liquid is too little, and the amount of water can not be too small, otherwise the steamed egg will become a boiled egg, and if you put too much water, it is easy to appear thin water eggs, resulting in egg custard is not formed, the best ratio of steamed eggs is 1:1 for water and eggs, and an egg is about 40 grams, and 40 ml of water is about the same.