Preheat the Oven: Set the oven to 350°F (175°C). Grease a 9-inch round cake pan and line with parchment paper.
Mix Wet Ingredients: Combine melted butter, granulated sugar, and brown sugar in a bowl. Add eggs one at a time, mixing well, then stir in vanilla extract.
Combine Dry Ingredients: In a separate bowl, sift flour, cocoa powder, and salt. Gradually add to the wet mixture, stirring until just combined.
Add Chocolate Chips: Fold in the chocolate chips until evenly distributed.
Pour and Bake: Pour batter into the prepared pan and bake for 30-35 minutes or until a toothpick inserted into the center comes out with moist crumbs.
Cool and Serve: Allow the cake to cool for 10 minutes in the pan, then transfer to a wire rack to cool completely before serving.