As avian flu continues to spread across the U.S., wiping out egg-laying chicken flocks and creating a shift in consumer habits, grocery stores have reported dwindling supplies and skyrocketing prices on the fragile protein source. More than 150 million poultry birds have been killed across the...
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How to use water to test if eggs are still fresh
Despite a "best by" or "packed on" date -- or if you have a couple extra eggs out of their carton in the fridge and don't remember when they got there -- this sink or float test is a good baseline to determine if an egg is still fresh.
First, fill a bowl with enough cold water to cover the egg, and gently lower the egg in. If it sinks to the bottom and stays on its side, the egg is very fresh, according to
The Spruce Eats, the food publication that regularly tests common kitchen and cooking tricks like this one.
An egg that sinks to the bottom but floats on an angle or upright is slightly older but still safe to eat. Eggs that float completely should be discarded as they're too old to safely consume, The Spruce Eats notes.
As eggs age, the shell becomes more porous so more air is able to flow through and can create a larger air pocket between the egg membrane and shell. That small sack of air, once large enough, is what makes the egg float.
How long do you have to safely eat eggs once cooked?
Cooked eggs and dishes made with eggs should be eaten immediately after cooking. They can also be stored in a shallow container for quick cooling and then refrigerated for later use within three to four days.
When it comes to hard boiled eggs, the USDA states that the shell's protective coating, or "bloom," which is produced by a hen when it lays an egg, gets washed away "leaving bare the pores in the shell for bacteria to enter and contaminate it."
For that reason, the USDA recommends hard-cooked eggs be refrigerated within two hours of cooking and used within a week.