Sourdough Discard Lemon Loaf

October 24, 2025

1 h 15 minutes

easy

1 loaf

If you love all things lemon, this loaf is made for you. Growing up, I spent summers making fresh lemonade almost every day, and lemon cakes were always my favorite treat.

This Sourdough Lemon Loaf is inspired by those bright, sunny flavors. It uses sourdough discard to create a tender, buttery crumb, finished with a glossy, sweet lemon glaze. The loaf itself is rich, moist, and soft, with a zesty citrus kick that makes it a perfect dessert or snack for spring and summer.

You can whip it up quickly using sourdough discard, or let it ferment a bit longer with an active starter to develop a deeper, more complex flavor. Either way, it’s an easy, delicious way to enjoy a burst of lemony goodness.

This recipe comes together quickly, so you can have a fresh, fragrant lemon loaf ready the same afternoon—perfect for unexpected guests or satisfying a sudden lemon craving.

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Ingredients:

Adjust Servings


	1 cup (240 g) sourdough starter discard (unfed is fine)
	1/2 cup (115 g) unsalted butter, melted
	3/4 cup (150 g) granulated sugar
	2 large eggs
	Zest of 1–2 lemons
	1/4 cup (60 ml) fresh lemon juice
	1 tsp vanilla extract
	1 1/2 cups (190 g) all-purpose flour
	1 tsp baking soda
	1/2 tsp salt
	Optional: 1/4 cup (30 g) poppy seeds for a lemon-poppy version

For the glaze (optional but recommended):

	1/2 cup (60 g) powdered sugar
	1–2 tbsp fresh lemon juice

Directions

Step 1:

Start by preheating the oven to 350°F (175°C). While the oven is heating, prepare your loaf pan: either grease a 9x5-inch pan generously with butter or nonstick spray, making sure to coat all corners and sides, or line it with parchment paper so the loaf can be removed easily after baking without sticking.

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Step 2:

In a large mixing bowl, combine the sourdough discard, melted butter, and sugar. Whisk them together until smooth and well incorporated. Next, add the eggs, whisking after each addition so the batter stays creamy and cohesive. Stir in the lemon zest and lemon juice. Finally, add the vanilla extract for a subtle sweetness that balances the tartness of the lemon. Mix everything together until the mixture is smooth and uniform—avoid overmixing, as this can lead to a dense loaf.

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Step 3:

In a separate medium-sized bowl, whisk together the all-purpose flour, baking soda, and salt. If you are making a lemon-poppy seed version, add the poppy seeds here as well. Whisking the dry ingredients together helps distribute the leavening evenly and prevents clumps, which ensures that your loaf rises consistently.

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Step 4:

Gently fold the dry ingredients into the wet mixture using a spatula or wooden spoon. Folding, rather than stirring vigorously, helps maintain the light texture of the batter. Mix just until the flour is incorporated; a few streaks of flour are okay. Overmixing can develop the gluten too much, making the loaf tough instead of soft and tender.

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Step 5:

Pour the batter into the prepared loaf pan, spreading it evenly. Place the pan in the preheated oven and bake for 50–60 minutes. The loaf is done when the top is golden brown and a toothpick or cake tester inserted into the center comes out clean or with a few moist crumbs.

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Step 6:

Once baked, let the loaf cool in the pan for 10–15 minutes. This allows it to firm up slightly, making it easier to remove from the pan without breaking. After this initial cooling, transfer the loaf to a wire rack to cool completely.

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Step 7: Optional

For an extra touch of sweetness and lemon flavor, make a simple glaze. In a small bowl, mix powdered sugar with lemon juice until smooth and pourable. Adjust the consistency by adding more sugar or juice as needed. Drizzle the glaze over the top of the loaf, letting it run down the sides for a beautiful, tangy finish.

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