01 -
Turn on your oven to 325°F. Coat an 8x5 loaf pan with a generous layer of cooking spray, then add a sheet of parchment paper to the bottom.
02 -
In a medium bowl, stir together cinnamon, flour, baking soda, and salt until they’re evenly blended.
03 -
In a separate bowl, whisk together the egg, sugar, and oil until they form a smooth mixture.
04 -
Gently mix the dry ingredients into the wet mixture. Stir in the buttermilk, mashed bananas, and vanilla until combined.
05 -
Pour the batter into the loaf pan, sprinkle walnuts on top, and bake it for 60-75 minutes. It’s ready when a knife inserted in the center comes out clean.