I am planning on doing a stacked square cake. I have never done a square....well....ever!?! So what is the easiest way to go about doing this? It is for a competition. Should i use mmf? I have never used mmf. is it harder than fondant? Thanks for the help you have no idea what it means to me!

Sorry your question is not very clear to me. Do you mean how to cover a square cake with fondant?

If yes...

Roll your fondant out so it's at least (2 x the height of one side plus the measurment of the top)

Transfer the fondant to the cake and start smoothing the edges where the sides meet first. Then you smooth the sides.

Try not to pull on the fondant because it will Stretch it and leave you with more wrinkles in the Fondant

I am assuming you have worked with Fondant before. So I am not going to go in to details but if you need more help feel free to mesage me.

Practice on a square pan.

Squares seem hard when you think about it, but in reality, I find it a bit easier than round. I know you are thinking of the "table cloth" effect - the folded corners - how to smooth down...

Hard to explain, but the fondant will adhere to the cake - I agree a practice round or two would not hurt - especially before a competition! Good luck!

Also, try not to totally smooth the sides into place before you work on the corners, it may get then "stuck" in that folded position if you do. Just keep pulling (lightly) and adjusting and then finally smooth it all down when it looks like it is molded to the entire shape.