Preheat the oven to 350°F.
Grease a loaf pan with non-stick cooking spray and line with parchment paper. Leave some paper hanging on two sides, it will help to remove banana bread with peanut butter. Set aside.
In a mixing bowl, whisk together mashed bananas, melted butter, milk, large egg, and vanilla extract. When completely combined, add granulated sugar and mix well. Set aside.
Add creamy peanut butter to another large mixing bowl, beat using an electric mixer until smooth. Then, add the banana batter and beat until completely combined. Finally, add all-purpose flour, baking soda, ground cinnamon, and salt. Mix using a rubber spatula until combined. Then, stir in chocolate drops.
Transfer the banana bread batter to the prepared loaf pan. Spread evenly. Bake in the preheated oven for 50-60 minutes or until ready. Check the readiness of the peanut butter banana bread with chocolate chips using a toothpick inserted in the center, if it comes out clean - banana bread is ready. Remove the loaf pan from the oven and let it cool completely in a pan. Then, remove from the pan, slice, and serve.