Preheat your oven to 350°F (175°C) and grease a 9x5 metal loaf pan.

Mash the four overripe bananas in a mixing bowl until smooth with small chunks remaining.

Cream the softened unsalted butter, granulated sugar, and brown sugar together until light and fluffy.

Add the large eggs, mashed bananas, and vanilla extract, mixing until well combined.

Sift together the all-purpose flour, baking soda, baking powder, and salt in a separate bowl, then fold into the wet ingredients.

Gently fold in the semi-sweet chocolate chips until evenly distributed.

Pour the batter into the prepared loaf pan and sprinkle the remaining chocolate chips on top.

Bake for 50-60 minutes, checking for doneness with a knife or toothpick.

Let the banana bread cool in the pan for 20 minutes before transferring to a wire rack to cool completely.