To take away stains, use a cream of tarter and water paste. A deep baking pan that has a hollow tube within the center, which permits for more uniform baking. A tube pan is used for baking muffins similar to angel meals and sponge cake. Tube pans could be made as a single piece of steel or as two items of steel consisting of a side and a flat round backside that is removable. Insulated bakeware is manufactured from two layers of metallic that are cushioned by a layer of air.