Lining a Straight-Sided Tin with Baking Paper

Lightly spray a clean and dry rectangular or square baking tin with canola oil, ensuring the entire surface and all the corners are lubricated. Cut a sheet of baking paper to the exact size of the base of the tin and lay it flat in the tin. Smooth out any wrinkles in the paper using a scraper or spatula. Finally, use a sharp knife to cut any excess paper from the edges so the paper fits the tin perfectly.