Mash the ripe bananas in a large mixing bowl.
Add the sweetened condensed milk and mix together.
Stir in the self-raising flour until just combined.
Optional: Add 1 teaspoon of ground cinnamon and mix in.
Pour the batter into a greased and lined loaf tin.
Bake at 180°C (360°F) for 45-50 minutes, until a skewer inserted comes out clean.
Allow the banana bread to cool in the tin for 30 minutes before removing and cooling completely on a wire rack.
