Preheat oven to 375° F. Line 2 large cookie sheets with parchment paper or grease with non-stick spray.
In a large bowl, combine cake mix, eggs and melted butter. Stir with a wooden spoon until combined. Batter will be thick.
In a separate small bowl, stir together powdered sugar and cornstarch. Set aside.
Shape dough into 1 1/2 inch balls. Roll balls in sugar mixture. Place 2 inches apart on prepared cookie sheets.
Bake one pan at a time for 9 to 10 minutes or until edges are set. Cool completely before serving.
Serve and enjoy!