Greaseproof paper is a type of paper that is resistant to grease and oil. It is used to prevent food from sticking and to protect surfaces from getting greasy. Full definition
Take tablespoonfuls at a time and roll into balls then flatten slightly and put on a prepared baking sheet (lined with greaseproof paper if not pre-liined) then bake for approx 15 min until firm and starting to brown very slightly. (carolinescooking.com)