Anyone tried it before?

What other chocolate cakes do you suggest for tapered topsy turvy cakes?

I use Kakeladi's ORIGINAL White Almond Sour Cream cake recipe. I just use a chocolate cake mix and substitute the water for whipping cream and add about 1/2 cup melted chocolate. It is nice and dense and really yummy. I also freeze my cakes overnight before carving.

http://www.cakecentral.com/cake_recipe-7445-The-Original-WASC-cake-recipe.html

I also use kakeladi's original WASC and use a chocolate cake mix. I substitute cocoa powder for 1/2 of the flour and coffee for the water. Freezing helps keep it moist.