Baking a tall cake in a regular pan I need to make a thick one layer cake (3-4") but I don't have a pan that deep.  Can I use parchment to add height?
Yes, you can do this like:


...though I would recommend multiple layers around.



That said, why is it that you "need" to do it this way rather than in layers? The actual baking of an 'extra thick' cake is likely to leave with cake that is over done at the edges and under done in the center.