Preheat the oven: Set to 350°F (175°C). Grease the loaf pan.
Mash the bananas: Use a fork until smooth.
Mix wet ingredients: In a bowl, whisk bananas, syrup, oil, vanilla, and milk.
Combine dry ingredients: In another bowl, mix flour, baking soda, cinnamon, and salt.
Blend everything: Slowly stir dry ingredients into wet mixture.
Fold in extras: Stir in walnuts or chocolate, if using.
Bake: Pour batter into the pan and bake for 50 minutes.
Cool and serve: Let it rest for 10 minutes before slicing