Sourdough Banana Bread Recipe
Rich, tangy sourdough starter combines with sweet ripe bananas in this perfectly moist bread that balances complex fermented notes with comforting banana warmth.
Ingredients
<ul class="ingredients-main-list"><li class="ingredients-single-item">100g active sourdough starter (100% hydration)</li><li class="ingredients-single-item">3 very ripe bananas (approximately 350g peeled weight)</li><li class="ingredients-single-item">80g unsalted butter, melted</li><li class="ingredients-single-item">100g granulated sugar</li><li class="ingredients-single-item">50g brown sugar</li><li class="ingredients-single-item">2 large eggs, at room temperature</li><li class="ingredients-single-item">1 tsp vanilla extract</li><li class="ingredients-single-item">240g all-purpose flour</li><li class="ingredients-single-item">1 tsp baking soda</li><li class="ingredients-single-item">1/2 tsp salt</li><li class="ingredients-single-item">1 tsp ground cinnamon</li><li class="ingredients-single-item">1/4 tsp ground nutmeg</li><li class="ingredients-single-item">80g chopped walnuts or pecans (optional)</li></ul>
Equipment
<ul class="equipment-main-list"><li class="equipment-single-item">9×5 inch (23×13 cm) loaf pan</li><li class="equipment-single-item">Parchment paper</li><li class="equipment-single-item">Stand mixer or electric hand mixer (optional)</li></ul>
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Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Begin by preheating your oven to 175°C (350°F). Line your loaf pan with parchment paper, leaving overhang on the long sides to easily lift the bread out after baking. Lightly grease any exposed parts of the pan.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In a large bowl, mash the ripe bananas thoroughly with a fork until smooth with very few lumps remaining. The riper your bananas, the sweeter and more flavorful your bread will be – those spotty, almost black bananas are perfect for this recipe!</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Add your active sourdough starter to the mashed bananas and stir to combine. The wild yeasts and bacteria in your starter will contribute complex flavors and a slight tanginess that beautifully balances the sweetness of the bananas.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Pour in the melted butter and mix well, followed by both sugars, eggs, and vanilla extract. Beat until the mixture is well combined and slightly aerated. The brown sugar adds moisture and a deeper caramel note than using just white sugar alone.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>In a separate bowl, whisk together the flour, baking soda, salt, cinnamon, and nutmeg until evenly distributed. The baking soda will react with the natural acidity in both the sourdough starter and bananas to help the bread rise properly.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Gradually fold the dry ingredients into the wet mixture, stirring just until combined. Be careful not to overmix – stopping when you no longer see dry flour is perfect. Overmixing develops gluten and can make your banana bread tough rather than tender.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>If using nuts, fold them in gently at this stage. The nuts add wonderful texture contrast to the soft crumb of the bread.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Pour the batter into your prepared loaf pan, smoothing the top with a spatula. For an extra touch, you can place a thinly sliced banana on top or sprinkle with a little brown sugar for a caramelized crust.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Bake in the preheated oven for 55-65 minutes, or until a skewer inserted into the center comes out clean with a few moist crumbs but no wet batter. If the top is browning too quickly, loosely cover with aluminum foil after about 30-40 minutes of baking.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>Allow the bread to cool in the pan for 10 minutes before using the parchment overhang to lift it out onto a wire rack to cool completely. This resting period is crucial as it allows the crumb structure to set properly – cutting too soon can make the bread gummy.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Once completely cooled, slice with a serrated knife. This bread will keep at room temperature, well-wrapped, for up to 3 days, or refrigerated for up to a week. The sourdough element actually helps preserve the bread longer than traditional banana bread! It also freezes beautifully for up to 3 months.</li></ol>
Chef’s Notes
A few helpful details for making this recipe.
Can I use sourdough discard instead of active starter for banana bread?
Yes, you can absolutely use sourdough discard instead of active starter in banana bread. Discard works brilliantly as it doesn't need to provide much rise (that's what the baking soda is for). Using discard reduces waste and adds the same delicious tangy flavour and improved texture.
How does sourdough enhance traditional banana bread?
Sourdough enhances banana bread by adding complex tangy notes that balance the sweetness, improving moisture retention for a longer shelf life, creating a tender crumb structure through natural fermentation, and providing beneficial bacteria that make it more digestible than traditional quick breads.
What's the best way to store fermented banana bread to maintain freshness?
For best freshness, cool completely before storing in an airtight container at room temperature for up to 3 days. The natural acids from fermentation extend shelf life compared to regular banana bread. Refrigerate for up to a week or freeze slices for 3 months, wrapped individually.
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