eggs!

[feelap]

I boiled 2 eggs on friday and i just opened one and the yolk has turned a semi-blue/grey colour! What does that?

[joko]

its normal. you can eat it. try putting the egg immediately into cold water after boiling next time

[woofgang]

gas produced when the egg is heated (related to that produced when the egg is digested!!) safe to eat but may taste a bit strong

[brachiopod]

It's perfectly safe - it just means you have been boiling your eggs for far longer than necessary. I know some people who will boil eggs for 25 minutes because they wanted them 'hard boiled'. About 4 to 5 minutes is fine, and then drop them in cold water.

The yolks will then be bright yellow and fluffy textured rather than dull yellow, crumbly, and with a blue / grey ring around the outermost part.

[Dreaming]

You boiled it on Friday. And opened it TODAY! eeek!