If your eggs bring to mind the Dr. Suess story, fear not. For one thing, "green" eggs are not in anyway unsafe, nor do they taste off—but they are unsightly. The discoloration around the yolk is due to a reaction between sulfur in the egg white and iron in the yolk. It occurs when eggs have been cooked for too long or at too high a temperature. Our method - cooking eggs in hot, not boiling, water, then cooling immediately - minimizes this.
Why do my hard-cooked eggs get green?
About Our Expert
If you have a cooking question, our expert, Marge Perry, can answer it. Marge teaches home cooks in her classes at the Institute of Culinary Education in New York City. She is an award-winning food writer, longtime contributor for Cooking Light and a number of other leading food magazines, author of the blog A Sweet and Savory Life, columnist for Newsday, and has contributed to over 20 cookbooks.
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