My hard-cooked egg yolks always turn green… why?

Very simple! You’re overcooking the eggs, causing the sulfur in the white to react with the iron in the yolk. Here’s how to cook the eggs to avoid that issue:

What you need:
Eggs, saucepan, water, ice water (optional)
How to do it:
Put eggs in a single layer in a saucepan and cover with cool water by about an inch. On high heat, bring to a rolling boil (this means it is bubbling all over the top of the eggs). Immediately remove the pan from the heat and cover. Let it stand 15 minutes. Drain into a colander and run cold water over the eggs… OR… remove eggs with a slotted spoon into a bowl of ice water. Cool for about 20 minutes.

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