Sourdough Discard Banana Bread Recipe (Super Moist & Easy)

If you have extra sourdough discard sitting in your refrigerator, don’t let it go to waste. This Sourdough Discard Banana Bread is one of the easiest and most delicious ways to use it. Made with ripe bananas, a touch of vanilla, and a small amount of sourdough starter, this quick bread is incredibly moist with a soft crumb and a subtle tang that perfectly balances its sweetness.

The sourdough discard doesn’t act as the leavening in this recipe. Instead, it adds a mild sourdough flavor while baking soda creates a beautiful rise. The result is a tender loaf that’s perfect for breakfast, afternoon coffee, or an anytime snack.

Why You’ll Love This Recipe

• A great way to use leftover sourdough discard
• Wonderfully soft and moist texture
• Rich banana flavor with a subtle sourdough tang
• Easy one-bowl recipe
• No mixer required
• Freezer-friendly and perfect for meal prep

Sourdough Discard Banana Bread Recipe

Bake the best Sourdough Discard Banana Bread Recipe with ripe bananas for an incredibly moist, tender loaf that's easy to make and perfect for using leftover starter.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr

Servings: 4

Course: Dessert

Cuisine: American

Ingredients Method

Ingredients

  

• 2 large eggs (about 100g)
• 2 very ripe bananas, mashed
• 1½ cups granulated sugar (300g)
• ½ cup vegetable oil (110g)
• 1¼ cups whole milk (300g)
• 1 teaspoon vanilla extract (5g)
• ¼ cup sourdough discard or active sourdough starter (50g)
• 1¾ cups all-purpose flour (250g)
• ½ teaspoon salt (3g)
• 1 teaspoon baking soda (5g)

Method

 

1. Prepare the Oven

   Preheat your oven to 325°F (163°C). Line a standard loaf pan with parchment paper or lightly grease it.

2. Mix the Wet Ingredients

   In a large bowl, whisk together:

   Eggs

   Mashed bananas

   Sugar

   Once combined, stir in:

   Mix until smooth.

   Vegetable oil

   Whole milk

   Vanilla extract

   Sourdough discard

3. Add the Dry Ingredients

   Add the flour, salt, and baking soda directly to the bowl.

   Stir gently until no dry streaks of flour remain. Avoid overmixing. The batter will be much thinner than traditional banana bread batter—this is completely normal.

4. Fill the Pan

   Pour the batter into the prepared loaf pan, filling it about three-quarters full.

   If you have extra batter, divide it between another small baking dish or a second loaf pan.

5. Bake

   Bake for 1 hour 20 minutes, or until:

   If the top browns too quickly, loosely cover it with foil during the final 20 minutes.

   The top is golden brown.

   A toothpick inserted into the center comes out clean or with just a few moist crumbs.

6. Cool

   Let the loaf cool in the pan for about 10 minutes.

   Transfer it to a wire rack and allow it to cool completely—at least one hour—before slicing.

Tips for the Best Banana Bread

• Use bananas with heavily spotted or black peels for maximum sweetness.
• Don’t overmix the batter to keep the loaf tender.
• Sourdough discard can be freshly fed or unfed straight from the refrigerator.
• Measuring ingredients by weight gives the most consistent results.
• Lining the pan with crumpled parchment paper helps it fit neatly into the loaf pan.

Optional Add-Ins

Customize your loaf with one or more of these:

• Chopped walnuts
• Pecans
• Chocolate chips
• Cinnamon
• Toasted coconut
• Blueberries

Fold about 1 cup of add-ins into the batter before baking.

Storage

Store the cooled loaf tightly wrapped at room temperature for up to 3 days.

For longer storage, refrigerate for up to 1 week or freeze individual slices for up to 3 months. Thaw at room temperature or warm gently in the microwave.

Serving Ideas

This banana bread is delicious served:

• Warm with salted butter
• Toasted for breakfast
• With cream cheese
• Drizzled with honey
• Alongside coffee or tea

Final Thoughts

This Sourdough Discard Banana Bread is a fantastic way to turn leftover starter into something comforting and delicious. The combination of ripe bananas, sourdough discard, and a uniquely wet batter creates a loaf that’s incredibly soft, rich, and moist every time. Whether you’re an experienced sourdough baker or simply looking for a creative way to reduce food waste, this easy banana bread recipe deserves a spot in your regular baking rotation.