In the articles section of this site there is a great tutorial on how to do a whimsical, or wonky cake. It has wonderful pictures.
here's the link to the tutorial
http://www.cakecentral.com/article1-Instructions-For-Building-A-Whimsical-Tilted-Cake.html
Do you mean one where the way it's stacked is an optical illusion of it being wonkee or are you thinking of ones that are tiered on supports that are wonkee? I am soo confused.......
I would love to know this information too- a off kilter cake from what I understand is different from a Wonka cake in that the layers have space between them. A wonka cake has tilted tiers on top of each other, but a Off- Kilter cake has tilted teirs that barely touch each other on their rims. Right? I would love a tutorial on how to do one.
"off-kilter" seems to be used to describe a number of different cakes, including topsy-turvy, rounds stacked off-center, tiers placed off-horizontal, etc.:
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