There are a few ways to reheat pulled pork for the best results. You can let the pulled pork defrost in the fridge and then reheat it in a skillet with a little bit of cooking fat for about 3-5 minutes. This will yield a slightly crispy pulled pork. If you want your pulled pork to have a similar texture to as when it was first cooked, then simmer the bag of pulled pork (sealed) in a pot of water. No need to defrost to reheat this way. Let the pulled pork simmer (not boil) for about 20 minutes or so until it's warmed through.