I know that I need to use cake board and dowels/straws etc when stacking different size layers on top of each other. But...can I stack 2 2'layers that are torted and filled (so they aren't really 2" tall at this point) on top of each other, or will it cause problems with the bottom layer? I just got my 1st Magic Line square pans (8") and I'm so eager to test them out. I'm testing new scratch recipe, new BC recipe, using BC as a filler.
Is there a stacking rule...if I wanted to place 3 2" layers (torted and filled) on top of each other for a very tall cake, does every layer need its own cake board & dowels or just the top? Thanks

If u mean taking two 2inch cakes placing them on top of each other to make a 4inch cake thats fine cuz i would assuming ur doing the same thing on the bottom.. so the dowels will hold it the top cake

General rule of thumb is you need support every 4ish inches of cake.

Super, thanks ladies! Exactly what I was looking for!