Eggs are usually boiled for 5- 10 minutes. Wash the eggs before you boil them, or they will get dirty. Boil in water until the water boils, and cook for 5 minutes. Most of the protein is ripe, but the yolk is not ripe. Cook for 7 minutes, the egg white is cooked and the yolk is cooked. This time is what we often call eggs in syrup; Egg whites and egg yolks are cooked in 10 minutes. At this time, the taste is just right. If boiled for too long, the nutrients of eggs will be destroyed and the taste will get old.