Preheat oven to 350 degrees. Coat a standard loaf pan (about 9 x 5 in size)with butter then sprinkle with flour.
Cut two of the Hershey bars into small chunks. Set aside.
On a plate, mash bananas with the back of a fork. Add to a large mixing bowl.
Add oil, sugar, vanilla and egg. Mix well.
Add flour, baking soda and salt, and mix.
Fold chocolate chunks into the batter. Pour batter into coated pan.
Top the banana loaf batter with pieces of the third Hershey bar (we like keeping the rectangle in-tact so that you could see the “HERSHEY” logo).
Bake for 50 to 55 minutes or until a toothpick comes out clean if inserted in the center.
Allow to cool for about 10 minutes and serve.