Preheat oven to 180 degrees. Grease a small loaf pan.
Add ingredients from oil to vanilla to the mashed bananas and whisk well till nicely combined.
Sift the dry ingredients over the wet mixture. Add the walnuts and fold in till combined.
Pour into the prepared pan and bake for 40-50 minutes or till skewer comes out clean.
Cool in pan for five minutes and flip onto a baking pan. Cool completely before slicing and enjoying!