You only have to break a rotten egg once to be wary of those expiration dates! But if you’re unsure of an egg’s freshness, you can always try this test to avoid bad eggs. Bad eggs will float in a bowl of water. So fill a bowl with enough water to submerge an egg, gently place eggs in the bowl and toss the floaters! Why does this work? Eggs have a small pocket of air in the large end.
As an egg ages, their porous shells allow moisture to escape which causes the fluid inside to decrease while allowing that air pocket to grow larger. Eventually, the egg contains enough air to float in water. When an egg reaches that stage, it’s no longer good to eat. It’s always better to be safe than sorry when it comes to expired foods, but this little trick is an easy way to decide which eggs may still be safe to eat.