PREHEAT oven to 350°F. Line a 13- x 9- x 2-inch baking pan with Reynolds Parchment Paper, extending paper to edges of pan; set aside. PREPARE brownie mix as directed on package for 13- x 9-inch pan. Stir in nuts. Spread mixture into parchment paper-lined pan. BAKE 28 to 30 minutes or until toothpick inserted 2 inches from sides of pan comes out clean. Cool. Use edges or parchment paper lining to lift brownies from pan. Place on a cutting board. Pull back edges of parchment for easy cutting. Cut into 12 bars. PLACE brownie on a serving plate, top with a scoop of ice cream, chocolate syrup, whipped topping and a cherry.