Heat oven to 350 degrees. Make and cool brownies as directed for 13 x 9 pan.
In small bowl, beat cream cheese, powdered sugar and peanut butter on medium speed until smooth. Spread over cooled brownies.
You can decorate them by sprinkling chocolate sprinkles or mini chocolate chips on top ( our favorite).
If using the melted semisweet chocolate for decoration - spread the cooled brownies with the cream cheese / peanut butter mixture and then refrigerate them for 15 minutes, melt the chocolate until smooth. Drizzle over brownies. Refrigerate about 1 hour or until chocolate is firm before cutting.