Interesting, Carl, that's one we haven't really hear about! Maybe it's sliding rather than shrinking. Is the pan non-stick? Or ceramic? Maybe a metal pan that doesn't have a non-stick coating on it would give the graham crumbs something to grip onto. That's our best guess without seeing it, but if you'd like to troubleshoot further, feel free to send a photo to our Baker's Hotline at customercare@kingarthurflour.com Annabelle@KAF

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