Preheat your oven to 175°C (350°F) and grease a loaf pan.
In a large bowl, mix mashed bananas, melted butter, and sugar until smooth.
Beat in the eggs one at a time.
In another bowl, whisk together flour, baking soda, and salt.
Gradually fold the dry ingredients into the banana mixture.
Pour the batter into the prepared loaf pan.
Bake for 50–60 minutes or until a toothpick inserted comes out clean.
Allow to cool slightly before slicing and serving.