why do purple beans turn green when cooked?

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Kristen M. September 9, 2010
There was a great answer to this on an earlier thread as well: http://bit.ly/bTxxYs
 
Merrill S. September 9, 2010
The info in this blog post seems to be the consensus on the topic; apparently, it's due to a chemical change brought about by cooking that exposes the chlorophyll in the bean. http://bit.ly/c9b5vH
 
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