Preheat oven to 400°.
Lightly spoon 2 cups flour into dry measuring cups; level with a knife. Combine flour and next 6 ingredients in a bowl; stir well. Make a well in center of mixture. Combine milk, oil, vanilla, yogurt, and egg; add to dry ingredients, stirring just until moist.
Toss raspberries with 1 tablespoon flour; gently fold into batter.
Spoon batter into 18 muffin cups coated with cooking spray, filling three-fourths full. Combine 1 tablespoon sugar and 1/8 teaspoon cinnamon; sprinkle evenly over muffins. Bake muffins at 400° for 20 minutes or until golden. Remove from pans immediately; place on wire rack.