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Chestnut flour expired. Can I still use it?

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Several years ago I bought chestnut flour, meaning to make castagnaccio. I never did, and last night I came across the flour, two years beyond its expiration date!

I'm assuming I should just toss it but wanted to check to see if it could be use-able. It wasn't easy for me to find, and it was expensive. I've never baked with it before and don't know how resilient the flour is.

Thanks!

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  1. I have the same question. I have some that has been sitting around for about a year. I've read that this flour is pretty perishable and gets bitter. Maybe someone has a good way to test it to see if it is.

    1 Reply
    1. re: karykat

      Smell test - chances are it's rancid. Nut flours should be kept in fridge/freezer and even then will go bad over time.

    2. Just taste a quarter-teaspoon or so. Rancid nut flour has a very distinctive flavor, so you'll have your answer fast.

      1 Reply
      1. re: dmd_kc

        Thanks for the replies! Yep, it was no good & I tossed it :-/