When I was a kid seems that a bag of marshmallows could last forever in the cupboard, and it kind of felt like it was one of those things that would survive the apocalypse. But contrary to that belief, marshmallows do expire and they can go bad.
A bag of marshmallows should have an expiry date on it somewhere. You oftentimes have to hunt for it and it can be kind of hard to see the printing of a date because it’s printed on clear plastic and the numbers are usually on the small side.
Marshmallows are usually pretty obvious when they start to go bad. You want to make sure they still have the powdery surface on them, and they should still smell like marshmallows. If they start to go rancid it definitely will not be a pleasant smell.
Once you open the package of marshmallows, you want to make sure you reseal it really tightly, or even put it into a Ziploc bag that you can push the air out of. Marshmallows go bad much quicker once the bag has been opened and the manufacturers usually recommend that the marshmallows get used up in about a week after the bag has been opened. But by storing them in a ziplock you can extend that time period quite a bit.
Do marshmallows last password expiry date? Yes, they do. Marshmallows usually will last for six months or so after the expiry date without having to worry as long as you are checking to make sure that they still look and smell good, and the bag has not been opened
If you are getting close to the expiry date on a bag of marshmallows, you can put them in a ziplock and put them right into your freezer. You might not think frozen marshmallows are good for much, but they’re great for hot chocolate, especially for little kids where you normally have to make the hot chocolate and then let it cool. The marshmallows will help cool it down for little ones. But you can also let them thaw and use them as normal.