What causes the green ring around the yolk of hard-boiled eggs?

Place the eggs in a saucepan and cover them generously with cold water (about 2 to 5 cm above the eggs).
Heat over medium heat until boiling.
As soon as the water boils, turn off the heat, cover the pan, and leave the eggs in the hot water.
For a slightly runny yolk: 9 minutes.
For a firm yolk: 11 to 12 minutes.
Immediately plunge them into an ice water bath for 5 minutes to stop the cooking and make peeling easier.
And there you have it, eggs with no green streaks and the perfect texture!

Little tips for trouble-free cooking
Cracked eggs? Add a pinch of salt or a tablespoon of white vinegar to the cooking water to reduce the risk of cracking.
Difficult to peel? Crack the shell and peel the eggs under running cold water. This makes it easier to remove the shell without damaging the white.
Storage: Unpeeled hard-boiled eggs can be kept for up to a week in the refrigerator. Once peeled, consume them within 2 to 3 days.
Why are eggs good for your health?

In addition to being simple to prepare and highly versatile, eggs are a true ally for your balanced diet. Rich in protein, they contribute to muscle recovery and promote a feeling of satiety. The yolk, meanwhile, contains choline, a nutrient essential for memory and concentration. And the icing on the cake: an average egg contains around 70 kcal!

Which proves that for perfectly boiled eggs, good timing and a few well-chosen tips make all the difference.