Preheat oven to 375°.
Combine first 3 ingredients; let stand 5 minutes. Add sugar, baby food, and egg; mix well. Lightly spoon flours into dry measuring cups; level with a knife. Combine flours and next 4 ingredients (flours through salt) in a bowl; make a well in center of mixture. Add bran mixture to flour mixture, stirring just until moist. Spoon batter into 12 muffin cups coated with cooking spray. Bake at 375° for 20 minutes or until muffins spring back when touched lightly in center. Remove muffins from pans immediately; cool on a wire rack.
Note: This muffin has a dense texture.