Serving it this way made plenty for a dinner party for 10. (epicurious.com)
I usually cook the pasta separately and just have guests add to their bowls when serving but you could easily mix it together and serve it that way too. (mysuburbankitchen.com)
I flipped the brownies over and sliced and served them that way because the surface was ugly... maybe the bottom of your brownies are brown? (dessertswithbenefits.com)