What is "greaseproof paper"?

Greaseproof paper, also known as parchment paper, is a type of non-stick paper that is resistant to grease and moisture. It is commonly used in baking and cooking to line trays, pans, and molds, preventing food from sticking and making cleanup easier. Greaseproof paper is treated to create a smooth surface that can withstand high temperatures, making it ideal for baking cookies, cakes, and pastries. It can also be used to wrap greasy foods like sandwiches or fried items, keeping them fresh without the grease seeping through.