So I remembered the hard way, that really you don't want to eat more than one paczek at a time. No, let me clarify: you DO want to eat more than one--many more--but really you should not. I learned this many years ago, when my roommate and I had bought a dozen of the plum ones, but I had forgotten this wisdom until, well, about 45 minutes ago, when I went ahead and ate the cream-filled one. (SO good.) Now I need to go lie down.
Consider yourself warned.