Mash the bananas with a fork.
In a large bowl, combine mashed bananas, sugar, eggs, and melted butter. Mix well.
Sift in flour, baking powder, and salt, then mix quickly until just combined.
Pour the batter into a loaf pan lined with parchment paper.
Bake in a preheated oven at 180°C for 35–40 minutes.
Let it cool, then cut into serving portions.