This cake was just made to see if I could do it. I didn't have the proper colors or decorations etc. It was fun though. I can not believe how easy it was.
I used two 4" round cakes for the dome of the hat. I stacked them with buttercream inbetween. I rounded the edges. I then stacked them on top of an 8" cake single layer. I iced the whole thing with buttercream and then let it dry awhile and then used papertowels to put a little design in the icing. I then just piped some ugly stars around it.