Following recipe, prepare brownies in 9 in. springform pan and 8 in. square baking pan. Prepare and bake cheesecake filling, following recipe instructions. Cool and chill cheesecake completely.
With Chocolate Decorator Icing and tip 5, pipe spirals, Cornelli lace or sotas on top of cheesecake. Add tip 21 rosette top border. Chill until ready to serve.