1. Preheat oven to 425°.
2. Combine first 7 ingredients in a medium bowl. Add corn, stirring well; make a well in center of mixture. Combine egg and buttermilk; add to flour mixture, stirring just until moistened.
3. Place cast-iron corn stick pans in a 425° oven for 5 minutes or until hot. Remove pans from oven, and coat with cooking spray. Spoon batter evenly into pans. Bake at 425° for 10 minutes or until lightly browned. Remove corn sticks from pans immediately, and serve warm.