In large bowl combine sugar, baking powder, baking soda, 1 cup flour and salt.
Add mashed bananas, shortening, and milk.
Beat with electric mixer on low speed til blended, then on high for 2 min. I just mixed with a spatula really hard and fast until smooth.
Add eggs and remaining flour, beat till blended.
If you are adding chocolate chips or nuts, add now.
Pour batter into greased 8x4x2 loaf pan.
Sprinkle brown sugar on top of batter.
Bake at 350 F oven for 55 to 60 minutes or until toothpick comes out clean.
Cool for 10 minutes.
Remove from pan, cool thoroughly on rack.