AOk, so I'm making my niece a Princess Cinderella cake for her 5th birthday. I will be using all buttercream, no fondant. I was trying to figure how much buttercream I need to make to cover the wonder mold part of the cake, I'm pretty ok on the 9" round it will be sitting on; I just wanted to know how much for the actual dress part(wonder mold) if anyone could help me out I would appreciate it! Thanks! :)

The usual formula is 1 batch of BC using 2# of sugar for each mix used.  This is usually a bit more than needed but I think it's best to make that much - especially so you have enough of each color made that youdon't have to make more & try to match shades.

AThanks! I ended up having more than enough and some leftover to store for a cake I have to do next week! :)