If you know you have burnt it, without stirring (which will mix up the burned stuff) pour off the main part on the top. Just DON'T STIR...that will mix it! You should be able to at least salvage the part that is on the top.
Once all is mixed from stirring, however, there is not much that can be done.
As another poster said, I use a crock pot for that type of cooking!
I have done that too many times, and my solution was throw it out. Then I got a crock pot, that won't burn the beans, if you put in enough water to begin with.
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