1, soak: before boiling eggs, it is best to soak the eggs in cold water for a while, and then put into a pot of cold water to boil, so that the eggshell is not easy to crack. Of course, this is only one of the ways to keep the shape of the egg intact.

2, fire: boiled eggs, if the fire, easy to cause rapid expansion of air in the egg shell and lead to shell cracking; if the use of small fire, and prolonged the time to cook the eggs, and it is not easy to grasp the degree of good eggs old and tender. Practice has proved that boiled eggs in the fire is most suitable.

3, time: After determining the size of the fire, as long as an accurate grasp of the time of cooking eggs, you can control the degree of tenderness of the egg at will. For example, soft boiled eggs, boil water for 3 minutes. At this time, the egg white solidified, the yolk is still fluid; cook loose eggs, boil the water and cook for 5 minutes. At this time the egg white solidified, the yolk was thick liquid, soft and smooth; hard-boiled eggs, boil the water and cook for 7 minutes. At this time, the egg white solidified, the yolk is dry. It should be noted that hard-boiled eggs do not extend the time at will. Because the eggs in the boiling water cooking time is too long, more than 10 minutes, the eggs will be a series of internal chemical changes, thus reducing the nutritional value of eggs.

4, stirring: in order to make the egg yolk solidified in the middle of the egg white, should be in the pot after the egg with a hand spoon constantly stirring in one direction, so that the water in the pot was swirling and turning, until cooked.