I have seen a lot of the 3D pumpkin cakes here on CC and I am planning on making one this Saturday. From a lot of the pictures, it looks like people put two bundt pan cakes (one on top of the other) together to create the form. My concern in the structure. I need help in identifying how to keep it from sinking, crumbling or breaking. I am worried that the top one will be so heavy it will smash the bottom cake.

I also have seen people torte bundt cakes and I think I would like to do it too.

Here are some pictures:
http://cakecentral.com/gallery/2165309
http://cakecentral.com/gallery/2154564
http://cakecentral.com/gallery/2147009
http://cakecentral.com/gallery/2054483

I have already baked the two bundt cakes, so no going back there.

Any ideas help. My only thought was to try and put dowels in the biggest part that will touch the cake board on the bottom and make sure I keep a cake board to separate the top and bottom layer.

Thanks for you help!!!

How tall will your cake be all together? If it's 4 inches or less, you wouldn't need any boards or support in there. I just saw a good recipe/tutorial on www . thecakeblog . com. She didn't put anything in there and it looked great. Miso, who made it, makes great cakes, so I'm sure if it needed support she would have put it in the cake.

If the cakes together will be more than 4 inches (by a significant amount), I would do what you described - put a board in the cake and dowels at the point where the cake will touch the board. There really isn't a wide margin at the outside that won't be touching the bottom board, so you could probably space dowels out fairly normally.

I just stacked up some 8" cakes and carved. I used two tiers with dowels in the bottom tier for support and made the cake board under the top tier smaller so I had room to carve cake without hitting cardboard.

I've made two of them and didn't use any supports and they were fine. The cakes didn't have to travel anywhere though.