Look, I’m not going to tell you this is the “right” way to seal jars. It’s not. But if you’re in a pinch—forgot to buy a water bath canner, or your stove pot is too small—and you’re only doing high-acid stuff, it can work. Just don’t blame me if a jar explodes or your pickles taste like a crisp.
Honestly, the best use for this trick is when you’ve made a few extra jars of jam and want a quick gift. Pop them in the oven, and they’ll seal about 80% of the time. The other 20% of the time, you’ll be fishing out shards of glass from your oven mitt. Your call.
Final ironic thought: We spend all this time trying to avoid air in our jars, and yet we’re shoving them into the oven—a device designed to circulate hot air. Isn’t life just a contradiction wrapped in a mason jar? Anyway, if you’re going to try it, keep a fire extinguisher nearby and don’t tell your food safety friends.
