Add the bananas to a bowl and mash them with a fork. Melt the butter and add it to the mashed bananas. Stir to combine. Aside, quickly whisk the egg in a bowl.
Always mixing with a fork, add the baking powder, sugar and egg to the banana mash. Fold in the flour, adding it in two batches. Lastly, fold in ⅔ of the chocolate chips.
Transfer mixture into a loaf pan lined with baking paper. Top with remaining chocolate chips. Bake in the preheated oven at 170°C (338°F) for 1 hour, or until a toothpick inserted in the centre comes out clean.
Notes
The nutritional information shared here is obtained using an online calculator and therefore only to be used as a guideline.