Preheat oven to 400°.
Combine pecans and 1/2 teaspoon cinnamon; mix well. Set aside.
Combine 1 teaspoon cinnamon and next 5 ingredients in a bowl, stirring just until moist.
Spoon batter into 12 muffin cups coated with cooking spray, filling two-thirds full. Sprinkle each with 1 teaspoon pecan mixture. Bake at 400° for 18 to 20 minutes or until lightly browned. Remove from pans immediately; place on a wire rack.