Preheat the Oven: Preheat your oven to 350°F (175°C).
Mix Ingredients: In a mixing bowl, mash the ripe bananas with a fork until smooth. Stir in the melted butter.
Combine: Mix in the baking soda and salt. Then, stir in the sugar, beaten egg, and vanilla extract. Finally, add the flour and mix until just combined.
Pour Batter: Pour the batter into a greased loaf pan.
Bake: Bake in the preheated oven for 60-65 minutes, or until a toothpick inserted into the center comes out clean.
Cool and Serve: Let the banana bread cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely before slicing.