I often pour a bowl of frozen veggies and a cup of chicken stock (straight from those 1 litre boxes) in a bowl and microwave it for 12 minutes. It comes out fairly hot.

Is this safe to do? Or am I risking food poisoning by not boiling the chicken stock?

  • Since this is about a specific product, why don't you ask the company directly instead?
    – Raditz_35
    Apr 16, 2018 at 9:58
  • 2
    12 minutes is a long time in a microwave oven1!!
    – Max
    Apr 16, 2018 at 12:49
  • @Raditz_35 I selected a specific brand as an example, I realistically use a few but assume they all share the same properties.
    – Nixu
    Apr 16, 2018 at 19:14

1 Answer 1


Aseptic packaging which is what the Swanson's and anyother brands products in those coated carboard-like packing 9a.K.a Tetrapaks) broth are safe. The aseptic processing has killed thhe harmful bacteria. So long as it was kept refrigerated below 40 deg F after opening it is still safe.

Your frozen veggies if notdefrosted then refrozen are safe.

Combining the two and heating in the microwave in a clean vessel is safe so long as you've not introduced bacteria from another source, your food is as safe as it is going to be.

  • 2
    Almost correct: “... kept below 40 F for 3-4 days or less”. After opening, the safety rules for cooked food apply. See our generic post for details. And you can safely thaw and refreeze food, it’s quality, not safety that will suffer (unless the cumulative time above 40F gets too large).
    – Stephie
    Apr 16, 2018 at 14:26

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