01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan or line with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, ground cinnamon, and salt until fully incorporated.
03 - In a large bowl, beat softened butter and granulated sugar with an electric mixer or whisk until pale and fluffy.
04 - Add eggs one at a time, mixing well after each addition. Blend in vanilla extract and mashed bananas until combined.
05 - Add dry ingredients to the wet mixture in thirds, alternating with milk, starting and ending with the dry ingredients. Stir gently just until no streaks of flour remain.
06 - Fold in chopped nuts or chocolate chips, if desired.
07 - Transfer batter to prepared loaf pan and smooth the surface.
08 - Bake for 50 to 60 minutes, or until a toothpick inserted into the center emerges clean.
09 - Let bread cool in the pan for 10 minutes before transferring to a wire rack to cool completely. Slice and serve.