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

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You’ve made hard-boiled eggs for your salad, and then… surprise: a green circle surrounds the yolk. It’s common, but far from tasty. Despite the fact that you followed your instructions exactly, why does this minor inconvenience keep occurring? And, above importantly, how do you avoid it without becoming a Michelin-starred chef? Here are all of our tips for perfect hard-boiled eggs that taste as delicious as they look.

The culprit? An unexpected chemical reaction

That iconic greenish ring isn’t the result of a poor egg or a failed cooking attempt. It’s merely a reaction between the iron in the yolk and the sulfur in the white that results from overcooking. The end outcome is a little layer of iron sulfide, which is nontoxic but visually unattractive. Fortunately, a few changes are sufficient to eliminate this issue.

Quick Tip: Hard Boiled Eggs (without that gray-green ring around the yolk) – Diane’s Food Blog

The surefire way for making flawless hard-boiled eggs

Begin chilly.

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.

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chef Amira Haddad is the creative heart behind FreyFood.com. Known for her love of fresh ingredients and comforting flavors, Amira transforms simple recipes into unforgettable meals. With years of home-cooking experience and a passion for Mediterranean and international cuisine, she shares easy, delicious recipes anyone can master — from quick breakfasts to indulgent desserts.