Whole, peeled or cut onions each have their own storage tips
Determining how to store onions comes down to whether you are dealing with whole onions or have begun the preparation process. Not surprisingly, onions take on an entirely different dynamic once you cut them. Just ask your eyes through the tears!
Our eyes tear up primarily because the act of cutting onions releases a chemical known as suberin and other enzymes. These substances create fumes that interact with the moisture in our eyes to create a burning sensation and encourage the formation of tears. Onions produce these fumes as a result of molecular stress from being cut and torn.
Finding a cool, dry, dark place with plenty of air movement is the best way to store whole onions. You can keep whole onions up to four weeks when stored properly in temperatures of about 45-55 degrees F. This is the same ideal temperature zone that works best for storing potatoes.
The strategy is slightly different for peeled or cut onions. Whole peeled onions last longest in the refrigerator, while you will want to place cut onions in an airtight container or bag, and also store in the refrigerator. Cut onions will remain good for about a week if stored properly.
Onions store much of their suberin in the root, meaning you can minimize the release of this chemical by peeling and cutting the onion from the top and leaving the root intact. Using a sharp knife also helps, since it reduces the amount of time you spend cutting and minimizes the tearing action that generates fumes.
About Farmer's PRomise
Farmer’s Promise farmers produce a wide range of potatoes and onions as a member of the Grimmway Produce Group family of brands. Check with your local grocer or visit Instacart.com for your nearest Farmer’s Promise grocery source.
