# Re: Sour Cream Going Bad?

**URL:** <https://boards.straightdope.com/t/re-sour-cream-going-bad/941781>\
**Category:** Cecil's Columns/Staff Reports\
**Created:** [May 10, 2021, 7:30pm UTC](https://boards.straightdope.com/t/re-sour-cream-going-bad/941781 "2021-05-10T19:30:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jim\_B](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/jim_b/32/4338_2.png) [@Jim\_B](https://boards.straightdope.com/u/Jim_B)\
**Post date:** [May 10, 2021, 7:30pm UTC](https://boards.straightdope.com/t/re-sour-cream-going-bad/941781/1 "2021-05-10T19:30:45Z")

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I could have sworn there was a Cecil Adams column about how do you know sour cream had gone bad. Anyway, [this](https://www.straightdope.com/21342088/why-is-there-an-expiration-date-on-sour-cream) is all I could find but it’s much the same thing.

My question is, I know when sour cream has gone bad. I want to know when blue cheese goes bad.

Think about it. Blue cheese is already smelly and moldy. And it has that bluish green mold on it. Penicillium I think it’s called. That is how I know my sour cream has turned. Blue cheese already has it. Think about it.

🙂

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**Author:** ![half-elf](https://avatars.discourse-cdn.com/v4/letter/h/ac91a4/32.png) [@half-elf](https://boards.straightdope.com/u/half-elf)\
**Post date:** [May 12, 2021, 8:30am UTC](https://boards.straightdope.com/t/re-sour-cream-going-bad/941781/2 "2021-05-12T08:30:55Z")

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Easy!  
Blue cheese is basically white/creamy coloured cheese with splotches/ patches of blue/ green.  
When it goes bad, it becomes covered in a uniform layer of mold which to me seems a slightly lighter blue than the “good” blue.  
I usually peel a layer of cheese off with a knife an consume the rest.  
It also tastes slightly different, more like “regular” cheese mold.  
(We have all had cheese with missed mold on at some point, right??)