Preheat oven to 375°.
Combine sugar and cinnamon in a small bowl; set aside.
Unroll dough, separating along perforations into 12 breadsticks. Brush both sides of breadsticks with melted butter. Sprinkle evenly with sugar mixture. Twist each breadstick about 3 times, and place on a large baking sheet coated with cooking spray.
Bake at 375° for 12 minutes or until golden. Serve warm.