Simply put, parchment paper (also called greaseproof paper) is paper that has been coated on both sides with a layer of heat-resistant silicone. The silicone makes it nonstick, greaseproof, and safe to use in ovens. Wax paper, on the other hand, is coated with wax (usually paraffin or beeswax). So, while wax paper is nonstick and grease-resistant, it melts and burns when exposed to heat. Read the full article here.