Why does a green ring appear around hard-boiled eggs?

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Place the eggs in a pot without crowding them. Cover the eggs with cold water, leaving about 3 to 5 cm of water over them.

Heat gradually.

Cook over medium heat. When the water begins to obviously boil, turn off the heat immediately.

Let time do its work.

Cover the pan and let the eggs soak in boiling water for 9 to 12 minutes, depending on size. For a slightly soft yolk, 9 minutes is enough. For a firm yolk, allow up to 12 minutes.

Express cooling

Meanwhile, prepare a bowl of iced water (or, failing that, very cold water). Plunge your eggs into it as soon as the resting time is over. This immediately stops the cooking process , prevents the green ring… and makes peeling easier!

Peel without stress

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