Preheat your oven to 350°F (175°C).
In a mixing bowl, mash the bananas.
Add sugar and softened butter to the mashed bananas and mix well.
Beat in the eggs one at a time, then add the milk.
In a separate bowl, combine the flour, baking soda, and salt.
Gradually add the dry ingredients to the banana mixture, stirring until just combined.
Pour the batter into a greased baking pan.
Bake for 45 minutes or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.