Creating this bread is a journey, much like the ones I took with my grandmother when we explored the markets of Asheville for the freshest ingredients. Follow these steps to bring the magic to your kitchen:

1. Preheat your oven to 350°F (175°C) and grease a 9×5-inch loaf pan.
2. In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
3. In a large bowl, mix the melted butter and granulated sugar until well combined. Stir in the eggs one at a time, followed by the vanilla extract.
4. Add the mashed bananas to the wet ingredients and mix until smooth.
5. Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk until just combined. Be careful not to overmix.
6. In a small bowl, combine the brown sugar and cinnamon. Pour half of the banana bread batter into the prepared loaf pan, then sprinkle with half of the cinnamon sugar mixture.
7. Top with the remaining batter and sprinkle the rest of the cinnamon sugar mixture on top. Use a knife to swirl the cinnamon sugar into the batter for that classic cinnamon roll effect.
8. Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean. Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.