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You can freeze coffee beans. Helps keeps them fresh a lot longer.

I do this. Get a kilo of good beans, freeze them in 250g batches.

Any issues with moisture? I find most things I freeze end up with condensation freezing inside the bag, which isn't going to be good for the coffee. I could imagine it going moldy within days of defrosting with the local humidity.

Not for me, no. Once they're defrosted they're in the fridge.

250g coffee doesn't last more than a few days for me anyway, but if you were worried about it you could split down again to 125g, so you've never got more than two or three days for mould to set in.

Not if you use zip loc bags

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