How to Tell if Chopped Onions are Bad?

If you want to know how to tell if chopped onions are bad, in this article, you will get all the crucial information about this question. The first thing to look for in chopped onions is whether they have mold or are firm. If they are mushy, they are already spoiled. If they are brown or discolored, they are also rotten. To determine if an onion is terrible, check its surface for black or brown spots.

You can cut the marks off to salvage some good parts if the marks are mushy. Once cut, onions should be stored in an airtight container in a cool place. Moisture makes onions spoil quickly. Please place them in a cool, dry area, preferably in a refrigerator. Use a brown bag with holes or a container without a lid. Avoid storing your onions in plastic wrap, which will exacerbate the problem. An excellent way to keep chopped onions is in the refrigerator.

choped onion

Whole onions can last for two months but can be kept in the refrigerator for up to three months. However, they can dry out and fade when supported longer than three months. However, this doesn’t mean that the onion is terrible! If the onion is a little older than that, you can use it in cooking, but you’ll have to cut away the layers to reach the new core. You can keep chopped onions in the fridge for a few months, but keep them refrigerated to extend their shelf life.


One of the most common vegetables in any kitchen is the onion. It can be used raw or cooked in various dishes; some even use onion circles to make sandwiches. Fresh, fried, boiled, or dried, onion offers many culinary possibilities. How do you know if an onion is terrible? It would be best to inspect the onions for dark spots and sprouting. Dark areas indicate mold is beginning to grow; squeeze the onion; a fresh one will be heavy and firm. It’s gone wrong if it’s soft and mushy.

How to Tell if Chopped Onions are Bad

Here are some most straightforward ways to tell if chopped onions are rotten:

  • The first way to determine if your chopped onions are wrong is by checking the flesh’s color and firmness. Onions with dark spots, soft spots, or an off-odor should be thrown out. Onions with any of these characteristics are generally suitable for a week, but they are likely to spoil a few days after cutting them.
  • The following way to know if your chopped onions are wrong is to check if they’ve developed slime. This slime signifies that fungi have already fed on the onion and started growing in it.
  • Consuming such onions could result in various health risks, including infection, hypersensitivity, and irritant effects. This is not to say that you shouldn’t eat them, but it’s better to avoid them entirely.
  • In addition to smell, you should also check the texture of the onion. Chopped onions should be smooth and firm; if they have any soft spots, they’re probably rotten.
  • Onions should also be firm and smooth. A squishy texture and a rotten smell are indicators that the onion is too old and has started rotting. If these signs are present, you should discard the onions immediately.
  •  Check the skin of your onion for sprouts, soft spots, or brown or black spots. It should also not be bruised or soft.

How Long do Cut Onions Last?

cutted onion

The good news is that onions are one of the longest-lasting vegetables in our refrigerators! How long does an onion keep in the fridge? Of course, everything depends on the vegetable’s state and storage conditions. Let’s look at the following information to understand the situation better.

  • Raw and whole onions can be stored for two or three months if kept in a cool dark place with a temperature of around 45-55 degrees Fahrenheit. If you don’t have a thermometer to measure the temperature, remember that it must be warmer than in the fridge and more remarkable than the average room temperature.
  • A stored whole and raw onion in a fridge can last up to three months.
  • Chopped or sliced raw onion will survive for ten days in the fridge only if kept in an airtight container. Nevertheless, if you have cut your onion into two pieces, it is better to put them into a plastic bag or airtight container or wrap them in a plastic cover.
  • The shelf life of cooked onions depends on where you keep them. If they “live” in the fridge, they can be used up to five days approximately after you cook them. If cooked onions dwell in your freezer, they will remain eatable for one year.

How to Store Peeled or Cut Onions?

To avoid contamination, keeping an onion in the fridge once peeled is best. Raw onions should be refrigerated in an airtight container or resealable plastic bag if halved, sliced, or chopped. When stored in this manner, they will last seven to ten days. Cooked onions should be kept refrigerated and stored in an airtight container. Cooked onions, like most leftovers, will keep in the fridge for up to four days.

Another advantage of refrigerating onions is that the cold inhibits the enzymes that cause onion tears. According to the USDA, whole peeled onions have a 10-14 days refrigerated shelf life, while diced and sliced onions typically last 7-10 days. It’s recommended to store cut onions in a sealed container or plastic bag while in the refrigerator.

Onions can be stored in the refrigerator for ten days, whether sliced, cut, or diced. Wrap them in plastic or a resealable bag to keep them fresh. Alternatively, pre-sliced onions are available in many supermarkets; refrigerate and use them before expiration. Sliced, cut, or diced onions can be frozen for three to six months for long-term use. Soups, stews, and casseroles are some of the best ways to use them.

How to Extend the Onion Shelf-Life?

To make onions available for cooking even longer, follow several easy but handy tips that will allow you to enjoy this vegetable while storing it at home.
  • Onions like cool and dark places, for example, in the cellar. Put onions in the fridge if you don’t have one in your house or apartment.
  • To help your onions last longer, wrap them in loose paper or keep onions in a mesh bag or basket. It will allow the air to circulate properly, and the vegetables won’t get rotten fast.
  • Never keep onions in plastic bags as they lack air inside, which ruins the vegetable.
  • It’s better to prevent the onion from “living” close to potatoes because they will get spoiled faster.
  • Never keep your onions close to fresh fruits, even watermelons. The reason is simple: fruits produce a specific gas that speeds up spoiling and rotting vegetables.


Using an onion keeper is another simple way to keep your onions fresh. You can store onions for up to two months if you don’t use them frequently. After you’ve purchased them, inspect them thoroughly for soft spots or signs of deterioration.

Keep in mind that one lousy onion can ruin an entire batch. The rest of the group is fine, but you should eliminate the bad ones. You can freeze chopped onions after being sliced to extend their shelf life.

Raw onions can be kept at room temperature for a week or two, and cooked onions can be frozen for 12 months. Keeping your onions in an airtight container is the key to choosing a suitable storage space. This will prolong their life and keep them fresh for more extended periods. When thawed, onions with mold will have a softer texture.