Preheat your oven to 350°F (175°C).
In a large bowl, mash the ripe bananas until smooth.
Mix in the melted butter until well combined.
Stir in the baking soda and salt.
Add the sugar, beaten egg, and vanilla extract, mixing well.
Gradually stir in the flour until just combined.
Fold in the chocolate chips gently.
Pour the batter into a greased loaf pan.
Bake for 60 minutes, or until a toothpick comes out clean.
Let it cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.