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How to Tell If an Onion is Bad




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To find out if an onion is bad, use the classic sniff test. Rotten onions often appear fine on the outside, but once you cut into them, they smell bad. The smell may be more subtle and hard to detect, but you should be able to tell from the color and texture. Moreover, look for bruises, soft spots, and other signs of deterioration. You should also cut open a rotten onion and smell its insides.


One of the best ways to determine if an onion is bad is by its odor. A spoiled onion will smell strong, no longer exhibiting that sweet caramelization smell. Instead, the smell will be more of a decaying, pungent one. As the onion decomposes, its color will also change from white to a dingy yellow. You may also be able to smell its insides by smelling them.

Onions are essential aromatics and the most crucial kitchen vegetable. They are also the third most popular fresh vegetable in the U.S., according to the National Onion Association. People often purchase onions in bulk, but may not use a full 5-pound sack of them. In this case, many people wonder how to tell if an onion is bad, and how to store them properly. There are a few easy ways to determine whether your onion is terrible.

No Soft Spots

How to tell if an onion has soft areas? If you have ever bought a grocery store onion and noticed some brown spots, softness, or mold on it, you are probably not eating a fresh onion. In this case, you should throw the onion away. A rotten onion will have an unpleasant odor and will eventually go bad. However, some onions can sprout and have a soft spot. If you’re not sure what to do, follow these tips.

When slicing an onion, look for spots that are soft and bruised. Look for these areas by squeezing the onion, or cut it in half to see how it feels inside. When checking the soft spots on an onion, make sure to examine at least 80 percent of its body. If you notice spots all over, it’s time to throw it out. You should also check if the onion is soft all the way through.

No Sponginess

One of the easiest ways to determine if an onion is bad is to check the texture. If the flesh is firm, it’s probably fine. If not, throw it out. Look for dark spots and off-smelling flesh. Depending on its stage of decomposition, it will look slightly different, with strands of white or liquid running through it. A soft or mushy onion is likely spoiled.

Onions can spoil for several reasons, including storage conditions that are too cold or too warm. They can also become damaged by exposure to excess light or air. Avoid storing onions with potatoes or in direct sunlight, and keep them in a cool, dry place. Otherwise, you could end up with a spoiled onion! However, the key to avoiding this happens often: onions can store for a long period of time. A good way to ensure that they’re fresh is to look for the following signs.

No Bruises

If you’re wondering how to tell if an onion is bad, there are several things you can do to spot the bad ones. Onions are usually the most common vegetable used in cooking, and their smell is one of their biggest clues. However, if you’re not a trained onion sniffer, you can learn to use your sense of smell and feel to tell if an onion is bad.

The classic smell test is also an effective way to tell if an onion is bad. While an onion can look perfectly fine from the outside, the inside can be rotten and stink. This means that you should cut it in half and smell its putrid odor. While it may seem difficult to smell a rotten onion, you can easily identify a bad one by its colour, moisture content, and smell.

No Air Circulation

When storing onions, you need to ensure that they have sufficient air circulation in order to keep them at a safe temperature. It’s best to place them in an airtight storage container in a cool, dry place. They should also be kept away from foods that emit the gas ethylene, which will accelerate their aging and spoiling process. Other foods that emit ethylene are bananas, melons, and apples. It’s important to avoid placing onions in plastic bags or plastic containers because this can lead to mold and mildew problems.

An onion must be stored at 40 to 50 degrees Fahrenheit, which is slightly warmer than refrigerator temperatures. The best place to store an onion is a dark, cool room that has adequate ventilation. A mesh or netted plastic bag is the best option, but if you have no other choice, a pantyhose or a bamboo steamer can also be used. Avoid storing onions in plastic bags because they will not maintain their ideal storage temperature. Avoid storing onions in basements or storage areas that are too warm and humid, because these spaces tend to retain humidity.

No Fungus

When buying an onion, you may be wondering how to tell if it’s bad. While onions have a shelf life, they will eventually become bad. One way to tell whether or not an onion is bad is to examine the texture and skin. It should be crisp and free from any mold or green. If the skin are discolored, the onion is not fresh. Check for any residue or sprouts, which are signs that the onion is past its prime.

Bad onions should have a strong smell. Some onions will smell pleasant, but if the smell is foul, it’s probably bad. The scent is also one of the ways to tell whether or not the onion is spoiled. Onions should smell like onions when held to your nose. Some onions may smell musty or fermented, which is a sign of spoilage bacteria or mold. You should also avoid onions that are soft or are covered in brownish liquid, which is another indicator of spoilage.

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