3 days ago, I decided to do some brown lentils, so I did a lentil soup with zucchinis and spice (a lot of cumin and cayenne). I didn't have tupperware so I left it in the pot with the lid.

And this morning, I found out they are fermenting. then is some bubbles and a strong fermenting smell, still a "clean" smell.

I'm not sure what to do, part of me want to throw it away but I don't want to waste it either. Can I save it or maybe use it for something else?


  • There are quite a few dishes that use raw fermented lentils (sometimes lentil flour) that is then cooked ... but usually it's only for a day or two, and you're using the yeasts that would've been on the lentils originally. (you've killed those by cooking, so we don't know what was doing the fermenting)
    – Joe
    Apr 10, 2019 at 13:39

1 Answer 1


Throw it away, it's spoiled and probably contains several colonies of foodborne illnesses. Sealing food isn't sufficient to stop it going off, you need to refrigerate it or freeze it.

  • Absolutely. Discard, don’t attempt to eat it.
    – Stephie
    Apr 7, 2019 at 20:19
  • 1
    Yeah! That I did, for safety. Apr 8, 2019 at 21:17
  • But I don't think it was spoiled, spoiled food as a bad or rotten smell, this was a really a fermenting smell like bread starter or ginger bug. Beside, I found some recipe with fermented crush lentils, so I think there is something here. That tells me that I didn't ask the right question. Anyways, thanks to both of you for the reply. Apr 8, 2019 at 21:26
  • 3
    Smell is not a good indicator, things can smell just fine but make you very sick.
    – GdD
    Apr 8, 2019 at 21:37
  • There is so much conflicting advice on the intentional fermentation of lentils that I would be very wary of consuming a result that doesn't arise from known ingredients and methods. Apr 10, 2019 at 7:58

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