Preheat oven to 350 degrees. In the bowl or an electric mixer, add butter and sugar. Cream together on medium speed until light and fluffy, about 3-4 minutes. Add eggs and bananas to mixing bowl. Mix on medium speed until combined.

Add flour, baking soda, salt and vanilla to mixing bowl. Mix on low speed until just combined. Add walnuts and chocolate chips to mixing bowl. With a spatula, fold in walnuts and chocolate chips until just combined.

Pour batter in a greased and parchment lined 9"x 5" x 3" loaf pan and bake at 350 degrees for 55 minutes. Turn oven off and leave bread in oven for additional 15 minutes.