Ryan Matthew Smith / Modernist Cuisine “There is always a best way of doing everything, if it be to boil an egg,” Ralph Waldo Emerson wrote. But the best way to cook an egg—be it boiled ...

Why does a gray or green ring appear on the yolk of the boiled egg? Ideally, when cooking an egg, we obtain a white white and a yellow yolk. However, sometimes, when peeling it, we discover a gray ...

Hard boiling an egg can yield a chalky yolk, while cooking low and slow can produce jelly-like, undercooked whites. Researchers cooked hundreds of eggs and used math to tackle this runny conundrum.