so my son wants a banana cake for his bday and I really wanted a filling other than chocolate, banana or peanut butter. Even a go banana split cake would work. thanks

I made banana cake before with a honey buttercream, which was really good. I also like passionfruit, so I have done passionfruit buttercream and I recently did a white chocolate passionfruit ganache. Hope this gives some ideas

This was just asked last week, and there were so many good suggestions like cinnamon, strawberry, and pineapple buttercreams! Let me see if I can find the thread for you:

http://cakecentral.com/cake-decorating-ftopict-682884-banana.html