Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large bowl, combine the cake mix, eggs, and vegetable oil until well mixed.
Fold in your chosen mix-ins.
Drop tablespoon-sized balls of dough onto the prepared baking sheet.
Bake for 9-11 minutes or until edges are set.
Let cookies cool on the pan for 5 minutes before transferring to a wire rack.