First, preheat oven to 350 degrees and spray a small pan with nonstick cooking spray. Combine sugar, melted butter, egg, and vanila in a small bowl and mix well. Then combine flour, cocoa powder, and salt in a small bowl. Add the two mixtures together and mix until smooth. Then add the chocolate chips and spread into the pan evenly to bake for 18-20 minutes. Finally, remove and let cool and enjoy!