In a bowl, mash bananas and mix with sugar, melted butter, egg, and vanilla.
In another bowl, whisk together flour, baking soda, salt, and cinnamon.
Gradually mix dry ingredients into wet ingredients, adding milk to keep it smooth.
Pour batter into the prepared loaf pan and smooth the top.
Bake for 40-45 minutes or until a toothpick inserted in the center comes out clean.
Let cool before slicing and serving.
Notes
Use overripe bananas for the best flavor and sweetness. Add nuts, chocolate chips, or raisins for extra texture. Store in an airtight container for up to 3 days or freeze for longer storage.