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Slices of sourdough banana bread stacked on top of each other.

Sourdough Banana Bread

Banana bread made with sourdough discard is ultra-tender and moist. This foolproof recipe has the best flavor and texture of any banana bread ever.
4.91 from 11 votes
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Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes
Servings: 16 slices (1 Loaf)
Calories: 191kcal
Author: Dahn Boquist

Ingredients

Wet ingredients

  • 1 cup mashed bananas from 3 to 4 ripe bananas
  • 8 tablespoons butter melted
  • ½ cup granulated sugar
  • ½ cup brown sugar
  • 2 eggs
  • 1 cup sourdough starter discard
  • 2 teaspoons vanilla extract

Dry ingredients

  • 1-⅔ cups all-purpose flour
  • 2 teaspoons baking powder
  • 1 teaspoon baking soda
  • ¾ teaspoon cinnamon
  • ¼ teaspoon nutmeg
  • 1 teaspoon salt

Optional

  • 1 banana for the top

Instructions

  • Preheat oven to 350°F. Grease a 9 x 5-inch loaf pan or line it with parchment paper. 
  • Combine the mashed banana, melted butter, sugar, brown sugar, eggs, and sourdough starter in a bowl. Stir well. 
  • Sift the flour, baking powder, baking soda, and salt over the wet mixture. 
  • Gently fold the dry ingredients into the wet mixture.
  • Pour the batter into the prepared pan. 
  • Split a whole banana in half vertically and place on top of the batter. 
  • Bake 55 to 60 minutes or until a toothpick inserted into the middle comes out clean or with only a few crumbs attached. 

Notes

  • If you let your sourdough discard sit for several days it will develop a stronger, more tangy flavor. Let it sit in the fridge for 5 to 7 days for the best flavor.
  • If the starter develops a watery hooch on top then dump the hooch off before adding the starter to the batter. The hooch will add too much liquid to the batter. 

Video

Nutrition

Calories: 191kcal | Carbohydrates: 31g | Protein: 3g | Fat: 6g | Saturated Fat: 4g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 2g | Trans Fat: 0.2g | Cholesterol: 36mg | Sodium: 322mg | Potassium: 111mg | Fiber: 1g | Sugar: 16g | Vitamin A: 219IU | Vitamin C: 2mg | Calcium: 44mg | Iron: 1mg