1. Preheat oven to 400°.
2. Combine first 7 ingredients in a bowl; make a well in center of mixture. Combine yogurt and next 5 ingredients; add yogurt mixture to dry ingredients, stirring just until dry ingredients are moistened.
3. Spoon batter into muffin pans coated with cooking spray, filling three-fourths full. Bake at 400° for 20 to 22 minutes or until lightly browned. Remove muffins from pans; place on a wire rack.
4. Combine powdered sugar and lemon juice, stirring mixture well; drizzle over warm muffins.