This Sourdough Banana Bread is super moist, using sourdough discard and overripe bananas to create a soft, fluffy loaf. It’s a classic, no-fuss banana bread that comes together easily and bakes up in just over an hour.
In a large bowl, use a hand mixer or stand mixer to cream the butter and brown sugar until light and fluffy. Beat in the eggs until smooth. Stir in the mashed bananas, sourdough discard, and vanilla until fully combined.
½ cup (113 grams or 1 stick) unsalted butter, ¾ cup (150 grams) brown sugar, 2 large (100 grams) eggs, 4 medium (about 400 grams) overripe bananas, ½ cup (100 grams) sourdough starter discard, 1 teaspoon vanilla extract
Gently fold the dry ingredients into the wet mixture until just combined—don’t overmix. Fold in walnuts or chocolate chips if using.
½-1 cup chopped walnuts or chocolate chips
Pour the batter into the prepared pan and smooth the top. Bake 60–70 minutes, or until a toothpick inserted into the center comes out clean.
Let the bread cool in the pan for 5–10 minutes, then transfer to a wire rack to cool completely before slicing.
Notes
Storage: Store in an airtight container at room temperature for up to 3 days or freeze for up to 3 months.