Patty-pans, patty pans –
Cups used for baking, usually paper. Items used to bake in them: muffins, cakes, quick breads, etc. Also made of other materials such as tin.
Other Links for Patty Pan History:
This link shows a selection from the Patty Pan collection in the La Trobe Collection, State Library of Victoria, black & white picture showing what some old-time patty-pan cups looked like.