Powdered sugar is most commonly used in frostings. To use powdered sugar to decorate your cakes, brownies, cheesecakes etc., use a stencil or cut waxed paper into 1/4 inch wide strips. Place stencil or strips in a diagonal pattern on top of your cooled dessert. Place confectioner`s sugar in a tea strainer, then tap it lightly to dust your bar surface. Carefully remove the stencil or strips to reveal your pattern.