Here's my problem. We don't have access to a oven (we are out of town for a week and out hotel room only has a microwave and a 2 range stove top). I purchased a frozen Blackberry Cobbler and we want to make it. Does anyone know how long I should cook it and is it safe?
It would almost certainly be safe, as there is nothing in a cobbler that could not be eaten if you just thawed the cobbler and ate it raw.
It is unlikely to be as good as when cooked properly in an oven because:
It is not really possible to give you a time to use because, even if there was some sort of "oven to microwave" conversion factor (which there is not):
If you can take it home frozen, I would cook and eat it at home once you have access to a normal oven.