Instructions:

• Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
• Step 2: Grease your loaf pan with butter or cooking spray, or line it with parchment paper for easy removal.
• Step 3: In a large mixing bowl, whisk together the flour, baking powder, baking soda, cinnamon, and salt. Set aside.
• Step 4: In another bowl, combine the butter and brown sugar. Beat on medium speed until light and fluffy.
• Step 5: Add the eggs one at a time, mixing well after each addition.
• Step 6: Stir in the mashed bananas, buttermilk, and vanilla extract until well combined.
• Step 7: Gradually add the dry ingredients to the banana mixture, stirring gently until just combined.
• Step 8: Fold in the chopped nuts evenly throughout the batter.
• Step 9: Pour the batter into the prepared loaf pan and smooth the top. Sprinkle with turbinado sugar.
• Step 10: Bake for 55-65 minutes, or until a toothpick inserted comes out clean.
• Step 11: Let the bread cool in the pan for 10 minutes, then transfer to a cooling rack.