Preheat oven to 350F , Grease a loaf pan and set aside .In a bowl, combine the butter, banana, sugars beat in the egg and milk and extract In a separate bowl, mix the dry ingredientsAdd the dry mixture to the wet mixture and combineFold in the nuts and chocolate chips, reserving a few chips to sprinkle on top. Pour into prepared pan and bake in preheated oven for 35-40 minutes