If you are baking the sweet potatoes all you need to do is rub them with a little vegetable or olive oil after washing them and before putting them in the oven. I put them on a baking sheet lined with foil. When they are done the peel will come right off. It's really easy!
They should be real easy to peel once they're fully cooked. Slice it in half. There should already be an air pocket between the peel and the interior part. At the roundest side of each yam half, pinch the peel and rub some between your fingers a few seconds, then twist lightly; it should come right off in one piece.
If this doesn't work for you after a few tries, just scoop out the contents. Refrigerated, cold cooked yams are even easier.
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