Preheat your oven to 350°F (175°C) and prepare a loaf pan by greasing it or lining with parchment paper.

In a large bowl, mash the ripe bananas until smooth, leaving some small chunks if desired.

Mix in the melted butter, sugar, egg, and vanilla extract until well combined.

In a separate bowl, whisk together the flour, baking soda, and salt. Gradually fold this into the banana mixture until just combined—avoid overmixing.

Pour the batter into the prepared loaf pan and bake for 60-70 minutes or until a toothpick inserted in the center comes out clean.

Let the bread cool in the pan for about 10 minutes before transferring to a wire rack to cool completely.