How to Make It
Combine first 4 ingredients in a large bowl; make a well in center of mixture. Stir together milk, oil, and eggs in a small bowl; add to dry ingredients, stirring just until dry ingredients are moistened. Fold in frozen blueberries. (Batter will be thick.) Spoon batter into 12 greased muffin cups, generously filling completely full. Sprinkle batter evenly with 4 teaspoons sugar.
Bake at 400° for 20 to 25 minutes or until tops are golden and a wooden pick inserted in center comes out clean. Remove from pan immediately, and cool on a wire rack 5 minutes.