Mash bananas on a plate with a fork; set aside.
Soften butter and add to a large mixing bowl.
Add granulated sugar, eggs, bananas, vanilla, baking powder, baking soda and salt.
Beat with an electric mixer until smooth.
Stir in the flour and chopped Butterfingers.
Spoon mixture evenly into four well-greased and floured miniature bread loaf pans.
Make sure pans are not more than three-fourths full.
Smooth tops with a knife.
Bake at 350° for 45 minutes to 1 hour.
To check for doneness, insert a knife or bamboo skewer into the bottom of the pan.
When knife comes out clean, bread is completely baked.
Allow bread to cool in pans on wire racks about 30-45 minutes.
Invert bread loaves onto wire cooling racks and cool completely.
Add Butterfinger icing and sprinkle each loaf with additional chopped Butterfingers.
When icing dries, cut bread down into slices: 6 slices per miniature loaf.
Yield: 24 slices.