I want to make brownies but I dont have any baking paper could I use foil instead
Yes, for browniesIf you choose to use aluminum foil, line your baking pan with the foil (bottom and sides all with one piece of foilMeaning cover the entire interior, not just lining the bottom.) Then lighty spray the foil liner with nonstick sprayOr lightly grease the foil with shorteningWhen the finished brownies are cool, you can slice them in the panOr you can lift the brownies out with the foil, then peel the sides of the foil down, and slice the brownies, then lift the brownies off the foil, and serve.