Preheat the oven to 350 degrees F. Grease a loaf pan and line the bottom with parchment.

Wet ingredients: Mix sugar and butter in a large mixing bowl until light and fluffy. Add the eggs one at a time, mixing after each addition. Add mashed banana and milk and stir to combine.

Dry Ingredients: In another bowl, mix flour, baking powder, baking soda, cinnamon and salt.

Combine: Add to the wet ingredients and stir everything just until combined. Stir in nuts or chocolate, if desired.

Bake: Pour batter into prepared loaf pan and bake for 55-65 minutes, or until a toothpick inserted in the center comes out clean. Cool in the pan for a few minutes before removing to a wire rack to cool completely.

Store leftover at room temperature or in the fridge, for 3-5 days, or freeze for up to 3 months.