Pre-heat oven to 350 degrees Fahrenheit, grease a loaf pan with butter and dust with all-purpose flour. Tap pan to remove excess any flour.
In the bowl of a stand mixer or a large bowl, cream together the butter, egg, and sugar.
Add the milk and mashed bananas, mix until well combined.
Add flour, baking powder, and salt. Mix until combined and homogenous.
Fold in the chocolate chips.
Transfer the batter into the prepared loaf pan and top with more chocolate chips.
Bake for 50 minutes to 1 hour or until a toothpick/knife inserted into the center comes out clean.
Let cool for ~10 minutes.
Remove from loaf pan and serve warm with butter.
Enjoy! :)