Lining a cake pan with parchment paper ensures that your cake comes out in one piece without sticking to the bottom or sides of the baking pan. But with modern nonstick pans, you don’t have to line a cake pan. Nonstick coating will release baked goods without difficulty. Still, some people prefer to grease or line the pan whether or not they’re using nonstick bakeware. Experiment with your cake pan to find out what works best for your bakes.