01 - Preheat the oven to 350°F. Grease a 9x5-inch loaf pan or line with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking soda, ground cinnamon, and salt until evenly blended.
03 - Using a large bowl and electric mixer or whisk, cream softened unsalted butter and granulated sugar together until light and fluffy.
04 - Beat in eggs one at a time, then mix in vanilla extract and mashed bananas until smooth.
05 - Alternate adding dry ingredients and milk to the wet mixture, beginning and ending with dry ingredients. Stir until just combined.
06 - Gently fold in chopped walnuts, pecans, or chocolate chips if desired.
07 - Pour the batter into the prepared loaf pan and smooth the surface with a spatula.
08 - Bake in the center of the oven for 50 to 60 minutes, or until a toothpick inserted into the center comes out clean.
09 - Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.