Pale chocolate, crushed - best before date?

[Piotr]

I ordered 10 kg of pale chocolate malt in a far-far-away shop, I hoped I will have stock for 2-3 years of brewing, but those idiots delivered me crushed grains, althought I didn't ask for it.

How log will the crushed grains be good for brewing?

 

[Orfy]

The sooner you use them the better.
As long as they are not damp they'll pretty much last forever BUT the fade away as far as flavour and colour go.

I suggest you taste a little, make notes and repeat on a monthly basis.
I know of people brew with year old grain.

Keep them cool and in a dark place and they'll last longer.