I remember seeing a wonderful rainbow cake somewhere here onC.C but for the life of me I can`t find it now !!! I thought it was one that macsmom had come up with. If any one can help me, that would be great !!! The batter had several different colors and was in layers.
thanks.

why don't you send her a PM?

I know she said she had white cake batter and then just added coloring. She would seperate the batter in half, color each and then just put one on top of the other.

I'm not good at adding photos but like leah said pm her for exact directions.

Here is a link to the thread where macsmom gives instructions for her rainbow cake:
http://forum.cakecentral.com/cake-decorating-ftopict-585413-rainbow.html