I've had an Indonesian cake, kueh lapis, which is made by brushing a
thin layer of batter into a pan, baking a few minutes till it's done,
taken out and another thin layer brushed on and baked, and so on. If
you're REALLY patient, I guess you can make a hunderd layers!

There is another version, it might have been German, instead of a pan
and baking, it's done by brushing layers of batter onto a spit and
roasting on fire, so when it's done and cut it looks like a tree
complete with rings.

And the Chinese version, thousand layer cake, is make by steaming not
baking.