Q. What is the purpose of parchment paper in the kitchen?

If someone is going to be roasting veggies or baking cookies biscuits and other treats on a sheet pan it's a good idea to line it with parchment paper first. It can prevent food from scorching or sticking to the pan and promote even cooking by acting as a barrier between the food and the cooking surface. It has several purposes in the kitchen of a baker including lining baking pans and providing separation between baked foods to prevent sticking. Baking thick cookies or other treats without them spreading all over the pan is much easier when using parchment paper.