I don't, but I've just been over these two threads (the second one is the second part of the first, the last few pages of which were corrupted in the great crash of a few years ago) and I've found several amazing recipes, all tested and attested to by people here on CakeCentral:
http://cakecentral.com/cake-decorating-ftopict-365233.html
http://cakecentral.com/cake-decorating-ftopict-579499-.html
I'm pretty sure that if you take a look at them, you'll find something mouth-watering and dense enough to carve and stack - that was one of the things mentioned about many of the recipes.
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