While this is still an idea and concept, I must say that it seems to be quite the invention. A man named Joshua Lankford has come up with a 3D printer that prints elaborately designed cakes. He is currently looking to come up with some resources to make this printer a reality, but from the looks of things I could see it being a success, especially within bakeries. It works but printing a layer of cake batter, one at a time, and then slowing feeding it into an oven. Once a portion of the cake is cooked it passes out of the other end of the oven while the newly printed layers enter. Read more about this idea at: http://3dprint.com/12793/3d-cake-creator-printer/