Eggs come with a natural protective coating called the bloom, which keeps air and bacteria out. In the fridge, that coating works like a tiny, invisible shield for weeks.
Officially, eggs are safe to eat for 3 to 5 weeks after the pack date—way past that “Sell By” sticker. So that carton you bought before last month’s holiday brunch? It’s probably still a hero in disguise.
But don’t just trust my word—trust the float test. It’s the world’s easiest science experiment, and it takes ten seconds. Fill a bowl with cold water, gently drop in an egg, and watch the magic.
What the Float Test Tells You
If your egg sinks to the bottom and lies flat on its side, congratulations! It’s fresh as a daisy. If it stands upright on one end (like it’s trying to impress you), it’s still perfectly fine—just a bit older.
If it floats to the top? That’s your cue to say goodbye. The air bubble inside has grown too large, and the egg has likely gone bad. But here’s the fun part: most eggs pass this test, even days past the date.
I once found a carton from a friend’s farm that was three weeks past its “best by” label. They sank like little stones. We made a massive frittata, and no one got sick—we just got full and happy.
Eggs Sell By Date Vs Expiration at Xavier Brill blog
