Add the chocolate cake mix, oil, eggs, vanilla extract, and semi sweet chocolate chips to a bowl and use a rubber spatula to mix until well combined.
Transfer the cake mix brownie batter to a greased 8X8 baking dish. Flatten down the batter into the pan using the rubber spatula.
Bake the brownies at 350 degrees for 20-25 minutes, or until a toothpick inserted comes out clean (mine were perfect right at 25 minutes).
Allow the cake mix brownies to cool completely before cutting.
