Preheat oven to 400°F. Spray 12 (2-1/2 inch) muffin cups with cooking spray.
Combine flour, sugar, baking powder, cinnamon, salt and nutmeg in a medium bowl.
Mix sweet potato, corn syrup, oil, eggs and vanilla in a large bowl; stir in dry ingredients just until moistened. Stir in pecans. Spoon into prepared muffin cups.
Bake for 20 minutes or until tops spring back when lightly touched. Cool 5 minutes; remove from pan.