Joyce, I don't believe either chilling or changes in altitude would have any effect on whether or not your almond flour cookies crumble. Perhaps it was the recipe you used? Or the almond flour? This recipe works well with the almond flour we sell, though I don't see why it wouldn't work well with other almond flours as well, so long as they're of a similar grind. I hope you give the recipe a try - it's really yummy! PJH

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