I'm hoping that the combined experience of all these readers will turn up what I'm looking for: Baumkuchen. Baumkuchen is a particular kind of cake which originated in Germany and is now very difficult to find here in the States. A true Baumkuchen is cooked on a special rotating device; batter is run along in thin layers as the rotating cake cooks, so that when cut the cake looks like it has rings, like a slice from a tree trunk. Years ago my family would get it from a bakery in San Francisco; they've since stopped carrying it, and the only info I could get from them was that the process was so labor-intensive that the place they got it from no longer made it. It's an incredible holiday cake, and I keep hoping that somewhere in the US they're still made---if anyone's come across them, please let me know! Thank you.