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

You’ve made hard-boiled eggs for your salad—only to find a green ring around the yolk. It’s a common issue, and while harmless, it’s far from appetizing.

Even if you follow instructions carefully, this discoloration still pops up. So, what causes it—and more importantly, how do you avoid it without becoming a gourmet chef?

The greenish ring is the result continue reading …