Step 1

Preheat oven to 350°F. Prepare a 9x5-inch loaf pan with non-stick spray.

Step 2

In a medium bowl combine the flour, baking soda, and salt. Stir with a fork to combine ingredients. Set aside.

Step 3

In a large bowl (or bowl of your stand mixer) add the butter and sugars. Mix on medium-high with a hand-held mixer until ingredients are fully incorporated, about 1-2 minutes.

Step 4

To the bowl add in the eggs, vanilla, and bananas. Mix very well until only a few lumps of banana remain. May need to scrape the bowl.

Step 5

Add in the flour mixture and the sourdough starter and stir gently by hand.

Step 6

Pour batter into prepared pan.

Step 7

Bake at 350°F for 55-65 minutes or until an inserted toothpick is removed with crumbs but no wet batter. Do not overbake.

Step 8

Allow to cool for at least 10 minutes before cutting.