I have to make a three tier wedding cake, 6",10" & 14". The 6" & 10" pans are three inches high, but my 14" pan is only two inches high. Would it work if I put a parchment paper collar inside the pan to make the cake taller when it is baked? I don't want to have to pay for yet another cake pan.
Yes. Simply add more batter to the collared pans to make up for the cake taller heights.
I've heard of people doing that and e'thing turning out ok. I personally have never tried it. Best bet is to do a practice cake.
Sorry, not very helpful, I know.