Honestly? Two to three days is the sweet spot. After that, even the best storage can’t save the texture. The flavor will fade, and that sharp kick will turn into a dull, musty whisper.
If you haven’t used it by day three, don’t feel bad. Chop it up and freeze it. Frozen chopped onion is a fantastic shortcut for soups, stews, and sauces. It loses its crunch but keeps all the flavor.
