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Author Topic: Why do white spots appear on chocolate kept in the fridge?  (Read 7192 times)

William Isdale

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William Isdale  asked the Naked Scientists:
   
Dear Naked Scientists,

I was wondering why white spots appear on chocolate when you leave it in the fridge?

Cheers.

William (Brisbane, Australia).

What do you think?


 

Offline Chemistry4me

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Why do white spots appear on chocolate kept in the fridge?
« Reply #1 on: 07/02/2009 10:48:08 »
Sugar crystal?
 

Offline Don_1

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Why do white spots appear on chocolate kept in the fridge?
« Reply #2 on: 09/02/2009 15:05:17 »
Sugar in chocolate can crystallize, usually after quite a longish period, to form a white crystalline coating. It should not have a detrimental effect on your choccy bar.
 

Offline lightarrow

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Why do white spots appear on chocolate kept in the fridge?
« Reply #3 on: 09/02/2009 15:32:54 »
Sugar in chocolate can crystallize, usually after quite a longish period, to form a white crystalline coating. It should not have a detrimental effect on your choccy bar.
Could it also be due to water evaporation? Maybe some water inside the chocolate vaporizes and the chocolate dries.
 

Offline yor_on

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Why do white spots appear on chocolate kept in the fridge?
« Reply #4 on: 09/02/2009 18:30:44 »
It is known as 'bloom' and perfectly edible.
"High temperatures bring out the fat (cocoa butter) from the chocolate, said chef Kim Johnson of Syracuse University's College of Human Services and Health Professions." 'Sugar bloom' is when sugar rises to the surface as Don_1 wrote.
That may be expected when the chocolate gets damp by leaving your fridge/refrigerator. It's also known as crystallization.

You could try to let the chocolate become room temperated while swept in a towel.
Although if it wave at you I would be careful.
« Last Edit: 09/02/2009 18:34:36 by yor_on »
 

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Why do white spots appear on chocolate kept in the fridge?
« Reply #4 on: 09/02/2009 18:30:44 »

 

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