1. Preheat oven to 350ºF. Line a 13-by-9-inch baking pan with foil; mist foil with cooking spray. In a small saucepan over low heat, melt chocolate with 2 sticks butter, stirring until smooth. Pour into a large bowl and let cool to room temperature.
2. In a bowl, using an electric mixer, cream peanut butter, brown sugar, cream cheese and remaining 1/2 stick butter until well combined, about 3 minutes. Beat in 1 egg.
3. Whisk 4 eggs, sugar and vanilla into bowl with melted chocolate; mix well. Stir in flour and salt. Pour batter into baking pan. Spoon reserved peanut-butter mixture on top and use a sharp knife to swirl mixtures together. Bake until a toothpick inserted into center comes out with a few moist crumbs attached, about 50 minutes. Let cool in pan on a wire rack.
4. Stir 1 to 2 tsp. cold water into confectioners' sugar until mixture forms a thick, smooth paste. Spoon into a pastry bag fitted with a small plain tip. Using a 1- to 2-inch cookie cutter, cut 12 football shapes out of brownie. Pipe laces onto brownies and allow to set before serving.