It literally means "tree cake" and that's how it looks, because it's made in layers on a spit. I imagine one could cram an impressive amount of magic into that.
Here's a German promotional YouTube video from 2011, showing Baumkuchen being made in a commercial bakery (no voice-over, just Vivaldi (?) for a soundtrack): https://youtu.be/0OX-pUQCwmM
Edited (changed my assessment of the music, on second watch) Date: 2017-11-25 12:34 pm (UTC)
(no subject)
Date: 2017-11-25 12:27 pm (UTC)