Do you have a gluten free sourdough starter and don’t want to toss the discard? Make a gluten free Sourdough Banana Bread with it! This recipe calls for one cup of mature sourdough discard for one of the tastiest banana breads you’ll ever eat! Make a regular size loaf or 4 mini. This banana bread freezes beautifully too! Just slice before you freeze and defrost what you need. This sourdough discard recipe is based off of the popular Gluten Free Banana Bread recipe from author Shay Lachendro.