In a medium bowl, combine flour, baking powder and salt (and dash of cinnamon for good measure); set aside
Cream butter & sugar; add eggs one at a time (eggs need to be room temp) and vanilla (mixture will look slightly curdled). Alternate adding flour mixture and milk until just combined. Gently fold in blueberries
Spoon batter into prepared muffin cups, filling each nearly full. In a small bowl, combine the 1 tablespoon sugar and cinnamon. Sprinkle sugar mixture over batter
Bake (25-30 minutes for standard size; 35-40 minutes for jumbo) or until golden and a wooden toothpick inserted in centers comes out clean
Cool pan on a wire rack for 5 minutes. Remove from pan; serve warm
Notes
Recipe yields 16 standard sized muffins or 6 jumbo muffins.