Simply fill a bowl with cold tap water and place your eggs in it. If they sink to the bottom and lay flat on one side, they are fresh and good to eat. A bad egg will float because of the large air cell that forms at its base. Any floating eggs should be thrown out.
Float test
If it sinks or stays at the bottom, it is still fresh. An older egg will either stand on its end or float. The float test works because air builds up inside the egg as it ages, increasing its buoyancy.
You can eat eggs past their expiration date. Just be sure to keep your eggs egg-cellent by storing them correctly. If you don't know if an egg is good or not, you can try the float test or give it a whiff. If it doesn't pass the test, throw it away.
Eggs may be refrigerated three to five weeks from the day they are placed in the refrigerator. The "Sell-By" date will usually expire during that length of time, but the eggs will be perfectly safe to use. Always purchase eggs before the "Sell-By" or EXP (expiration) date on the carton.
Simply fill a bowl with cold tap water and place your eggs in it. If they sink to the bottom and lay flat on one side, they are fresh and good to eat. A bad egg will float because of the large air cell that forms at its base. Any floating eggs should be thrown out.
Eggs that are "expired" might stay fresh for a few weeks after their date, but if an egg is spoiled, it should not be eaten. Spoiled eggs could be contaminated with salmonella, a bacterial infection that leads to diarrhea, vomiting, fever, and cramps.
As long are they are kept refrigerated at 45 °F or lower, fresh shell eggs are safe to be consumed four to five weeks beyond the carton's Julian date (the date eggs were packed).
Place an egg in a bowl of water. Older eggs will float because a large pocket of air forms in the base, but fresh eggs will sink. This is one of the simplest ways to test for freshness. An egg will immediately smell bad if it is off.
"expiration" date thing. According to the USDA: A "best if used by/before" date lets you know how long the eggs will be at their best taste and highest quality. You can definitely still eat eggs once this date has passed (as long as they aren't spoiled).
What happens if you use old eggs. If you use older eggs, the cakes will not rise as well and pavlovas will be flatter than they should be. Generally, the cakes will still work as long as you get some volume from beating, they just won't be as tall or light-as-air as they should be.
The theory is that, as an egg ages, the air pocket inside it grows larger, buoying an old egg to the surface. But, according to Dr. Schaffner, “there is no scientific basis for the egg float test.” So experimenting to see if your egg sinks or swims is not a reliable way to measure its quality.
Old eggs should always be disposed of responsibly to avoid contamination and food-borne illnesses. You can choose to compost, feed them to animals, recycle them at local centers, or throw them in the trash. Eggs with foul odors or discoloration may be spoiled and should not be eaten.
If the egg white is pink or iridescent this is an indication of spoilage due to Pseudomonas bacteria. Some of these bacteria can make us sick when eaten and they will produce a greenish, fluorescent, water-soluble color. Also, a spoiled egg (cooked or raw) will have an unpleasant odor once you crack it open.
Salmonella is common in eggs, whether they are good or bad. However, salmonella is cooked out of eggs with heat. As eggs go bad, they develop other types of bacteria like E. Coli that lead to severe illness.
Fresh eggs are more dense than fresh water and therefore will sink. However, as the water's salt content increases, it becomes denser. The eggs float in the two beakers with the added salt.
Eggs older than 3 months will likely float and should be tossed out.
Around 6 months, puree or mash one hard-boiled or scrambled egg and serve it to your baby. For a more liquid consistency, add breast milk or water. Around 8 months, scrambled egg pieces are a fantastic finger food.
6 to 8 months old:
Want to serve hard-boiled eggs? Simply mash with water, avocado, breast (human) milk, formula, or yogurt if dairy has been safely introduced.
Eggs can legally be sold up to a month after the sell-by date, after which they are indeed illegal but still very much edible for another two weeks or so, longer if they're hard-boiled and kept in the shell.
Can I still use them? Yes. Older eggs are ideal for baking cakes, quiches and frittatas. They are also perfect for hard-boiling, scrambling, and making omelettes.
Always purchase eggs before the Sell-By or EXP (expiration) date on the carton. After the eggs reach home, they may be refrigerated 3 to 5 weeks from the date they are placed in the refrigerator. The Sell-By date will usually expire during that length of time, but the eggs are perfectly safe to use.