I think they can get hard, and putting in microwave would soften them, but really there is nothing in them(home made) to go bad for quite a long time. I can't say about boxed ones, except look for the expiration on the box
I was just thinking how long the krispies would stay fresh and crunchy, or do they get stale after some time?
I really have no idea how long they stay good for as I've never made a batch that wasn't completely consumed in less than 24 hours (often within an hour!).
I'd love to be able to make a bunch to dip into chocolate and store for that last minute tray to put together.
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