Preheat the oven to 350 F. In a large bowl, mix cake mix with peanut butter, eggs, and vegetable oil until smooth. Fold in the chocolate chips. Place the sanding sugar into a shallow dish.
Roll the cookie dough into balls and roll in the sanding sugar. Place cookies onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.