Preheat the oven to 350°F (175°C)
Grease a 9×5-inch loaf pan
Mash 3 ripe bananas in a bowl
Mix in 1/3 cup melted butter
Stir in 3/4 cup sugar
Add 1 beaten egg
Mix in 1 teaspoon vanilla extract
Add 1 teaspoon baking soda
Add a pinch of salt
Stir in 1 1/2 cups all-purpose flour
Mix until just combined
Pour the batter into the prepared loaf pan
Bake for 50 to 60 minutes
Check doneness with a toothpick
Let the bread cool in the pan for 10 minutes
Remove from the pan and cool completely
Slice and serve