Preheat your oven to 350°F (175°C). Prepare a 9x5 inch loaf pan by greasing it with butter or lining it with parchment paper for effortless bread removal.
In a medium mixing bowl, combine the melted butter with the mashed bananas. Stir until the mixture is smooth and well blended.
Next, add the vanilla extract, baking soda, and a pinch of salt to the banana-butter mixture. Stir gently until all ingredients are incorporated.
Gradually mix in the sugar and the beaten egg, making sure that the mixture is homogenous without overmixing.
Carefully fold in the all-purpose flour and ground cinnamon until just combined. It's important to avoid overmixing to keep the bread tender.
If desired, gently fold in the chopped walnuts or pecans for delightful texture and flavor.
Pour the banana bread batter into your prepped loaf pan, spreading it evenly.
Bake in the preheated oven for 60-65 minutes, or until a toothpick inserted into the center of the bread comes out clean.
Once baked, allow the banana bread to cool in the pan for about 10 minutes. Then, transfer it to a wire rack to cool completely.
Notes
For a delightful serving experience, slice the warm bread and enhance each piece with a pat of butter or a light dusting of powdered sugar. For a charming touch, garnish with a banana slice beside the bread on the plate!