Once the cake comes out of the oven, let it rest outside for about 10 minutes. Then, run a butter knife across the sides of the pan to make sure there's nothing stuck. The knife should run clean. Then, take a plate that's slightly larger than the pan, and cover the pan with the plate. Now swiftly, you just flip the whole thing over and gently pull the pan off. Upside-down beauty. Your mandarin orange cake is ready to be devoured.