Step 1

Preheat your oven to 350 degrees and grease a 9x5" bread pan.

Step 2

In a medium mixing bowl, mash the bananas with the back of a fork. Mix in the sourdough starter, egg, and softened oil or butter. Add sugar and mix well to combine. Create a well in the middle of the wet ingredients.

Step 3

Into the center of the well, add the flour, salt, and baking soda in that order. Mix the wet and dry ingredients until nearly combined. Add the walnut pieces and fold in until all of the batter is combined.

Step 4

Scrape batter into your prepared bread pan and place in preheated oven. Bake at 350 degrees for 50-60 minutes or until a cake tester comes out clean. Allow to cool in pan for a few minutes before transferring to a cooling rack.