You’ve probably tried the “throw it in a baggie” method. I know I have. It’s okay, but it’s not the best. Why? Because onions love to breathe, and they release gases—like that sulfur stuff that makes you cry—that can actually speed up spoilage if trapped.
Think of it this way: putting a cut onion in a sealed plastic bag is like locking a teenager in a room with no windows. They start getting weird, and things go sour fast. Instead, we need to give our onion a little room to exhale.
Trick #1: The Paper Towel Hug
Here’s the first cool trick. Grab a clean, dry paper towel and gently wrap that cut side of the onion. Not too tight—just a cozy hug. Then, pop the wrapped onion into a reusable silicone bag or a glass container with a loose lid.
The paper towel acts like a sponge, absorbing excess moisture that leads to sliminess. It also keeps the gases from concentrating directly on the onion’s surface. It’s basically a tiny, absorbent sleeping bag for your onion half. Change the paper towel every day if you want next-level freshness.
Beat Spoilage: How to Keep Onions Fresh for Months
