So I made these pumpkin whoopie pies a few weeks ago and I was totally amazed at how easy they were. They turned out to be such cute little cakey cookies with a delicious cream cheese frosting. But then, the weirdest thing happened. I put them in an airtight container overnight and when I opened the container to serve them the next evening, they were watery. As in there was liquid all over the bottom of the container. I have no idea what happened. Any ideas?? Is that a pumpkin thing?