Is parchment paper always coated with Teflon?

No, parchment paper is not always coated with Teflon. Most parchment paper is treated with a silicone coating, which makes it non-stick and heat-resistant. Teflon is a brand name for a type of non-stick coating often used on cookware, but it's not typically used in the production of parchment paper. Always check the packaging for specific details about the materials used.