Angel Food Collapse

A reader has asked: I recently had a miserable failure with angel food cake. Before I could turn the pan upside down for the cake to cool, it collapsed into a pancake. Any idea what I did wrong?

A: Your cake may have been under baked, in which case it would collapse fairly quickly after coming out of the oven. Or, you might have left it standing too long before inverting it, which could also cause it to fall.