I didn't realize I had underbaked a quick bread until I came home and it had sunk in the middle after several hours. I stuck it back in the oven for several minuets but it's still guey in the middle. Can I salvage it?
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Probably not, but you can cut around the underbaked portion and eat that.
I'll bet you could take the underbaked portion (or even all of it), make a custard, and make a "bread pudding" type thing out of it (sweet or savory, shouldn't matter) and "save" it that way.