Sourdough Banana Bread

Got overripe bananas and extra sourdough starter? This Sourdough Banana Bread is the answer. Moist, flavorful, and incredibly easy to make, it combines the natural sweetness of ripe bananas with the subtle tang of sourdough discard. Perfect for breakfast, afternoon coffee, or a late-night snack, this loaf is one of the best ways to put extra starter to delicious use.

Ingredients

Batter

✅ 1 cup (240g) sourdough discard

✅ 3 ripe bananas, mashed

✅ 2 eggs

✅ ½ cup melted butter

✅ ¾ cup brown sugar

✅ 1 tsp vanilla extract

✅ 1½ cups all-purpose flour

✅ 1 tsp baking soda

✅ ½ tsp salt

✅ 1 tsp cinnamon

Optional Add-Ins

✅ ½ cup chopped walnuts

✅ ½ cup chocolate chips

Instructions

Step 1: Preheat

Preheat oven to 350°F (175°C).

Grease or line a standard loaf pan.

Step 2: Mix the Wet Ingredients

In a large bowl, combine:

• Mashed bananas
• Sourdough discard
• Eggs
• Melted butter
• Brown sugar
• Vanilla

Mix until smooth.

Step 3: Add the Dry Ingredients

Add:

• Flour
• Baking soda
• Salt
• Cinnamon

Mix just until combined.

Fold in walnuts or chocolate chips if using.

Step 4: Bake

Pour batter into the prepared loaf pan.

Bake for 55–65 minutes, or until a toothpick inserted into the center comes out clean.

Step 5: Cool

Allow to cool in the pan for 15 minutes.

Transfer to a wire rack and cool completely.

(Or slice it warm and pretend nobody saw.)

Baker's Tip

The blacker the bananas, the better the flavor. Those ugly bananas sitting on the counter are actually banana bread gold.

Baker's Warning

You will tell yourself:

"I'm only cutting a small slice."

Then you'll cut another one for quality control.

Then another one because the first two were uneven. 😆

Want Better Sourdough Baking?

🐿️ Start with Squirrelly Girl Sourdough Starter — our beginner-friendly dehydrated starter from a real working micro bakery.

🌎 https://squirrellygirlstarter.com/products/squirrelly-girl-sourdough-starter

One starter. Endless possibilities.