I am making my first 3 tiered cake (all single layers) for a basketball banquet and need to know about the layers of the cake.
1-- what is the best thing to use under each layer?

2-- Do I even need to put anything between the layers other than buttercream?

Any help would be greatly appreciated!

Well I am no expert but I think I'd make a 2 tier { like a 8" 2 layer and a 6 " 2 layer and just put about 3 wooden dowels in the middle , You will still have the hieght but if u make a three tier single layer it will be kinda flat and not so bold looking but still cute I am sure . And you could use dowels for this too . I am sure you could use round cake bords and dowels ut I have done a prtty heavy 2 tier cake with just dowels just cuz I did'nt know what the heck I was doing BUT guess what it worked it looks alittle silly b/c I had never used mmf b/f so I kinda messed that up but all in all ok

Probably use cake boards and dowels, better safe than sorry. I really like the look of a single layer 3-tier cake. There is one in my photos if you want an example. Good luck!