Tips for boiling eggs:
1, soak in water.
Before boiling eggs, it is best to soak the eggs in cold water for a while, and the water must not touch the eggs, otherwise the protein will not solidify easily, which will affect digestion. Soak the eggs in cold water for a while to reduce the air pressure in the eggs; Then put it in a cold water pot to cook, so that the eggshell is not easy to break. Of course, this is just one of the ways to keep the egg intact.
2. firepower.
If you use fire when cooking eggs, it is easy to cause the air in the eggshell to expand rapidly, resulting in the eggshell bursting; If you use a small fire, it will prolong the time of boiling eggs, and it is not easy to grasp the tenderness of eggs. Practice has proved that medium fire is most suitable for boiling eggs.
3. Time.
After determining the firepower, as long as the cooking time is accurately mastered, the degree of tenderness of the eggs can be controlled at will. For example, boil soft eggs for 3 minutes. At this time, the egg white is solidified and the yolk is still fluid; Boil the eggs and cook for 5 minutes. At this time, the egg white is solidified, and the yolk is sticky, soft and smooth; Boil hard eggs for 7 minutes. At this time, the egg white is solidified and the yolk is dry. It should be noted that hard-boiled eggs must not be prolonged at will. Because the egg is boiled in boiling water for too long, beyond 10 minute, a series of chemical changes will occur inside the egg, thus reducing the nutritional value of the egg.
4. In the process of cooking, in order to solidify the yolk in the middle of the egg white, the egg should be stirred in one direction with a spoon after entering the pot, so that the water in the pot turns in a vortex shape until it is cooked. As for what this principle is, it must be related to centrifugal force and centripetal force in physics.