The prune cake looks like wood grain. Unfortunately, the link does not really tell you how to assemble it, just how to bake/fry the layers.

Thanks Bibliovore for answerin that..yerp, the grill is actually bake.. Each layer took about 10-12 mins.. But the end result is surely a hit.. :) you are suggested to double the ingredients as I did.. The cake becomes taller and worth every mins you baked them!

Vintagejenta, there' a step by step instructions on how to assemble the cake in my blog..