Preheat the oven to 350 degrees. Line a large baking sheet with a silicone lined baking sheet, or spray with cooking spray, set aside.
Add the eggs to a large mixing bowl and beat until smooth. Stir in the cake mix and oil or melted butter, and vanilla extract (if using). Stir until a smooth, thick dough forms.
Fold in the chocolate chips. Chill the dough 10 minutes.
Use a small cookie scoop and place the dough on the lined baking sheet (I got 30 cookies). Very lightly press the dough down.
Bake 10-12 minutes until they begin to brown slightly. Allow them to cool at least 10 minutes on the baking pan, they will continue to cook on the hot pan.