Rethinking upside down cake for a crowd. I have to transport it offsite and now I'm wondering about unmolding it. One option is to keep it in a warming oven. I'd have to drop them off at noon and have them held pretty hot for 2-1/2 hours. Then unmold on a cutting board. I don't think they will unmold cold. Or I can made now and unmold to serving tray. Serve cold.