Instructions

Preheat oven to 325F. Grease a 9x5x3 loaf pan or line with parchment paper.

1.  Sift the flour together with baking soda and baking powder.
2. Add salt.
3. In another bowl mix melted butter with sugar.
4. Add eggs and buttermilk.
5. Stir in flour mixture, then mashed bananas.
6. Fold in walnuts and orange zest.
7. Transfer into a prepared pan.
8. Bake for 1 hour and 10 minutes.
9. Cool on a wire rack.