We bought some sweet potatoes from the store and a few days later we chopped them up to make some roasted veggies.
To our surprise, the insides of the potatoes were full of holes or cavities. There was also a small amount of milky white substance that would gather in tiny droplets around the edge of the cut.
I had no idea what was going on so we threw them out. What's the deal? Were these bad? Was throwing them out the right thing to do?
The outside looked pretty normal, so I'm not sure how to identify this in the future.
Best Answer
Okay, after looking around a bit, I think the proper description of the sweet potato in your picture is 'pithy'. And I saw some pics where this condition had progressed much further than it had in yours. It seems that what causes this is temperatures too high during the storage time. I found references to this in several places.
From the University of Arkansas :
(Emphasis mine.)
So, while they probably wouldn't have hurt you, they were obviously inferior quality and most likely wouldn't have tasted very good. Good call on tossing them!