It is important to know the volume capacity of your pans and pie plates, as we have noticed that some manufacturers have been making their pans smaller. This is especially true with cake pans that have sloped sides, as most layer cake recipes are written for pans having straight sides.
We at times receive comments on our Ask A Question inquiring why a cake did not fill a pan to our stated level for the recipe. In most cases, it was that the pan held a different volume.
When I was still in Minneapolis, MN several years ago, Rose called me.
“Please see how many cups of water your angel food pan holds. You can probably use duct or masking tape to tape the two pieces together so that the water does not leak out. Call me back in a half hour or so when you have an answer.”
I called her back in five minutes. “ 16 cups.”
“How did you do that so fast?” Rose exclaimed.
“I lined the pan with a light weight trash can liner and filled it with cupfuls of water.”
“Why did you do that?” As Rose is always questioning.
“Because I did not want to remove the tape and have to wash the pan.”
Rose then called a leading pan manufacturer to ask their cake pan technical department if they had a specification sheet for the cup capacity on their current series of pans. When they unbelievably responded they did not, Rose lectured them on how to get that specification using my method.