But older eggs have had more time for the air to penetrate the shells, so they're more buoyant and will float. Some people also claim you can hold an egg up to your ear and shake it to test for freshness.
If you can hear liquid sloshing sound inside the egg, it's probably gone bad, but if you hear nothing, it's fine to eat. Personally, though, I don't think this method is as reliable. Additionally, there is the candling method, which is used primarily for testing egg quality before they're sold, but it could help determine freshness too, though it's more difficult to see at later stages.
You can put a flashlight right next to the eggshell to light up the insides, but historically, a piece of cardboard with a small hole in it was used, with a light source behind it and the egg in front.
The above method will let you see the air space and mold, but it's really a difficult technique to get down. Above you can see a fresh egg little air space, slightly visible yolk , a slightly old egg larger air space, slightly darker yolk , a nearly bad egg really dark yolk, spotty , and a spoiled egg mixed in yolk, lots of dark , lit up using the candling technique. If you want to see inside your eggs more often, try out this LED egg candle light — it's made to check if an egg is fertilized if you're into that.
If you don't need the shell intact, you can also crack the egg onto a plate or other flat surface to test how fresh it is. If it's fresh, the yolk should be bright yellow or orange, and the white shouldn't spread much.
If you're not sure, give it a good sniff: fresh eggs shouldn't have much of a smell at all. The yolk will be flatter and the white will be much runnier in an older egg. An egg that spreads out when cracked isn't necessarily bad, though, just older and again, good for hard-boiled eggs. If it's gone bad, you probably won't even need to do the sniff test—even slightly rotten eggs will have a very strong, distinct smell you'll notice right away.
Got a bunch of eggs that are going to go bad before you can use them? Hard-boil them and throw them in a jar with a beet brine to make tangy, delicious, and beautifully purple pickled eggs.
Looking for more eggy tips? There are also lots of things you can do with those discarded eggshells , like make your teapot super clean, fertilize soil, and make sidewalk chalk. And don't forget about those leftover egg cartons , which make good seed and fire starters, bird feeders, and candle-making molds.
Do you know of any other ways to test whether or not an egg is good to eat? Share your method with us in the comments. Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.
Turns out, where in the fridge you store your eggs also makes a difference. The bottom line: Eggs typically last three to five weeks in the fridge even if beyond their sell-by date. To confirm an egg is safe to eat, check it for any changes in appearance or smell. Weight Loss. United States. Type keyword s to search.
Today's Top Stories. Taraji P. Accessible Beauty Products For All. Are expired eggs safe to eat? As eggs age, the air cell grows larger. Older eggs have larger air cells, so they float. Newer eggs have smaller air cells, so they sink. However, according to the USDA, even eggs that float may still be good. Buying good quality eggs in the first place—and knowing the signs of a spoiled egg. The USDA recommends always buying your eggs from a refrigerated case, as this is an indicator that they have been properly stored.
Before you buy them, open up the carton and make sure the eggs have clean, uncracked shells. Lastly, make sure to refrigerate your purchased eggs as soon as possible. If you run across an expired egg, crack it open first before you toss it.
Published April 30, Published February 21, Center for Food Safety and Applied Nutrition. Food and Drug Administration. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance.
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