Preheat your oven to 350°F (175°C) and grease a 9x5 inch loaf pan with butter or non-stick spray, then lightly flour it.

Mash the overripe bananas with a fork until mostly smooth, leaving a few small lumps for texture, ensuring at least 1 cup of mashed banana.

Add the softened unsalted butter to the mashed bananas, mix until combined, then stir in the sugar, eggs, and vanilla extract until creamy.

Whisk together the flour, baking soda, baking powder, and salt in a separate bowl.

Gradually add the dry mixture to the wet ingredients, folding them together without overmixing.

Gently fold in the chocolate chips until evenly distributed.

Pour the batter into the prepared loaf pan and bake for 50-65 minutes or until a toothpick comes out clean from the center.

Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.