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I bought a quart of soy milk for the first time ever last week. It has been sitting unopened in the door of my refrigerator since. I pulled it out today to use it in a bowl of cereal and it was frozen solid.

My refrigerator is not particularly frigid; regular milk and juice products stored in the back do not freeze. It's even more shocking to me that it froze in the door of my fridge, since that is the warmest place.

Is this normal for soy milk? If not, what went wrong? How should I store soy milk?

*The expiration date is sometime in March 2011

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    I have seen one weird fridge that actually had vents letting cool air in in the front from the freezer, through the same assembly as the ice dispenser... you don't have one of those, do you?
    – Cascabel ♦
    Jan 15, 2011 at 23:28
  • @Jefromi: Nope, I have never had anything in my door freeze.
    – hobodave
    Jan 16, 2011 at 0:16
  • Wow, then I'm as stumped as you are. I've seen it stored next to regular milk all the time, and I've never seen it freeze.
    – Cascabel ♦
    Jan 16, 2011 at 2:23
  • It's only the "warmest" due to opening/closing the door a lot, so the temperature cycles ... in the bottom of the door of a fridge where it hasn't been opened for a day or two can get colder than the top of the fridge. But even with that, I find my eggs freeze before the soy milk will.
    – Joe
    Jan 16, 2011 at 5:12
  • Is it actually frozen? I've had soy milk (and coconut milk as well) just go completely solid in the fridge before. Melting it over low heat reconstituted it again, but the texture wasn't quite 'right'
    – KimbaF
    Jan 16, 2011 at 10:15

2 Answers 2

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Have you ever put a quart-sized container of plain water in the spot where your soymilk froze? Perhaps that spot in your fridge is actually very cold--not cold enough to freeze milk with all its fat content (even skim as some), but enough to freeze soymilk (especially if it's settled and separated a bit).

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  • Yes, if it will freeze soymilk, it will certainly freeze water. Freezing point depression and all.
    – Michael Natkin
    Jan 16, 2011 at 20:49
  • I have a quart of water sitting in the same spot right now. I have not opened my refrigerator in the past 16 hours. I will check when I get home tonight.
    – hobodave
    Jan 17, 2011 at 19:04
  • It didn't freeze :-\ The soy milk is literally the only thing that has ever frozen in my refrigerator.
    – hobodave
    Jan 18, 2011 at 21:22
  • Well, it was worth checking.
    – bikeboy389
    Jan 18, 2011 at 22:16
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I've had the same thing happen - in fact, I've had a brand new soy milk freeze solid, sitting next to the other carton of soy milk that is around half full, which isn't frozen. Both the same brand and type of soy milk - one frozen solid, one not frozen at all. So I suspect that something may go wrong in some batches of soy milk that affects the freezing temp, but I have no idea what. Mine is Silk brand, organic unsweetened.

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