01 - Preheat oven to 350°F (175°C). Grease a 9x5-inch loaf pan and set aside.
02 - In a mixing bowl, whisk together flour, baking soda, and salt until evenly distributed.
03 - In a separate bowl, combine melted butter, granulated sugar, eggs, and vanilla extract. Mix thoroughly until the mixture is uniform.
04 - Stir mashed bananas into the wet ingredients, blending until just combined.
05 - Gradually fold the dry mixture into the banana blend. Stir until no visible flour remains; avoid overmixing.
06 - Gently fold in walnuts or chocolate chips, if desired.
07 - Pour batter into the prepared loaf pan, smoothing the top. Bake in the preheated oven for 50–60 minutes or until a toothpick inserted into the center comes out clean.
08 - Let bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.