Preheat oven to 350 degrees F. Line a large baking sheet with parchment paper and spray lightly with nonstick cooking spray.
In a small bowl, combine sugar and cinnamon. Set aside.
In a separate large bowl, combine cake mix, eggs and oil. Stir until well blended. Shape dough into 1" balls and roll in cinnamon-sugar mixture. Place balls 2" apart on prepared baking sheets. Gently flatten dough balls with the bottom of a glass, or your palm.
Bake for 7-9 minutes, or until almost set (To be “super soft”, the cookies should look a little under-baked). Cool 1 minute on baking sheets before removing to a cooling rack to cool completely.