When using baking paper should it be shiny side up?

When using baking paper, it generally does not matter which side is up. Baking paper is typically coated on both sides with silicone or another grease-proof coating, so either side can come into contact with the food without affecting the cooking process or taste.

However, some bakers may have a personal preference for placing the shiny side up or down. Some believe that the shiny side reflects heat better and promotes more even cooking, while others prefer the dull side up to prevent sticking. Ultimately, it's a matter of personal choice, and there is no scientific evidence to suggest a significant difference in the cooking outcome based on which side is facing up.