I bought a square angel food cake pan. It's a real novelty.
I have my grandmother's square angel food cake pan. It's much bigger then the new ones I've seen.
How are you baking that you are "pulling out the center"
I think it is meant the center is pulled out after baking so there will be a hollow to fill with the filling. Like a bread bowl or bun sandwich. I pull out the center of most all my sandwich breads so the toppings stay put.