Preheat oven to 350F. Lightly grease a 9x13" pan and line with parchment paper, let the sides overhang on the short ends. Set aside.
In a standup mixer add the eggs, cocoa, salt, baking powder and vanilla and mix for about 4 min.
Meanwhile mix together the melted butter and sugar and add it to the egg mixture, stir until smooth.
Add the flour in and mix until incorporated. Add in the chocolate chips.
Spoon the batter into the prepared pan.
Bake for 30 min., the edges should be set and the middle very moist but not uncooked. Don't over bake. Cool on a rack.
When cooled, lift the brownie out using the parchment paper. Slice off the end edges to shape a football.
Make the icing in a standup mixer incorporating the icing sugar into the butter slowly. Then adding in the cocoa, vanilla and whipping cream to desired thickness.
Ice the brownie and decorate with laces etc. to look like a football. Refrigerate but bring back to room temperature before serving.