"Edit this bar recipe to swap the chopped peanuts for Reese's Pieces, and add a no-stovetop chocolate topping. Keep the recipe simple and ensure it does not require a stand mixer or pastry blender; use only basic mixing by hand or with a handheld mixer. Maintain the original bar-cookie style and baking method. Include clear ingredients and step-by-step instructions for the revised recipe, with the chocolate topping made without cooking on the stovetop."