Preheat the oven to 350°F (175°C).
In a mixing bowl, mash the ripe bananas until smooth.
Mix in the melted butter with the mashed bananas.
Add brown sugar, egg, and vanilla extract to the mixture.
Sprinkle baking soda and salt into the batter, then mix thoroughly.
Gently fold in the all-purpose flour until just combined.
Pour the batter into a greased loaf pan.
Bake in the preheated oven for 60-70 minutes.
Let the banana bread cool in the pan for 10 minutes before transferring to a wire rack.
Slice and enjoy your incredible banana bread!