The Perfect Sourdough Discard Recipe for a Moist and Flavorful Treat
If your anything like me you always have extra sourdough discard. I'm always struggling to find ways to use my discard so it doesn't go to waste. This sourdough discard carrot cake is one of my favorite solutions to this problem. Moist, spiced, and topped with rich cream cheese frosting, it’s the kind of dessert that surprises everyone when you tell them it includes sourdough starter. I love this recipe in the spring, but dare I say I love it even more in the fall when I'm harvesting my last batch of carrots. The hearty flavor and texture pairs perfectly with a cozy cup of tea, or evencoffee.
Whether you’re looking for a creative sourdough discard recipe or just craving a perfectly soft and sweet carrot cake, this discard carrot cake is sure to impress.
Why This Sourdough Discard Carrot Cake Works
This isn’t just any carrot cake — it’s a sourdough carrot cake that combines the natural tang of sourdough discard with the cozy flavors of cinnamon, nutmeg, and sweet carrots. It’s:
- Moist and tender thanks to butter and grated carrots
- Perfectly balanced with warm spices and light sourdough tang
- Topped with a rich cream cheese frosting that takes it over the top
- A smart way to reduce waste by using sourdough discard
A fun addition to this recipe is crushed pecans. If I add them I like to add them to cake and to the frosting, this gives the cake a little extra crunch and flavor!
Ingredients
For the Carrot Cake:
- 2½ cups all-purpose flour
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- 1 teaspoon salt
- 1½ teaspoon ground cinnamon
- ½ teaspoon ground nutmeg
- ½ teaspoon ground clove
- ½ teaspoon ground ginger
- 1⅓ cups melted butter
- 1½ cup packed brown sugar
- ½ cup granulated sugar
- 4 large eggs
- 2 teaspoons vanilla extract
- 3 cups grated carrots (about 5 whole carrots depending on the size)
- ½ apple sauce
- ½ cup sourdough discard, or active sourdough starter
- ½ cup crushed pecans (optional)
For the Cream Cheese Frosting:
- 1 block cream cheese, room temperature
- 1 cup unsalted butter, softened
- 1 teaspoon vanilla extract
- 2 cups powdered sugar
- ½ maple syrup
- ½ cup crushed pecans (optional) to sprinkle on the top of the frosted cake
Instructions
1. Preheat and Prep
Preheat your oven to 350°F (175°C). Grease and flour a 9x13-inch pan or line with parchment paper.
2. Mix Dry Ingredients
In a medium bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg.
3. Combine Wet Ingredients
In a large bowl, whisk melted butter with brown sugar, granulated sugar, eggs, vanilla, and sourdough discard until smooth.
4. Combine and Fold
Add dry ingredients to the wet mixture and stir until just combined. Fold in the grated carrots and pecans. You can set this mixture aside for up to an hour or in the fridge overnight to allow the grains to ferment a bit, but this step isn't necessary and you will still have amazing flavor without a full ferment.
5. Bake
Pour the batter into your prepared pan and smooth the top. Bake for 40–45 minutes, or until a toothpick inserted in the center comes out clean.
6. Cool and Frost
Let the cake cool completely. Meanwhile, beat cream cheese and softened butter until smooth. Mix in vanilla, then gradually add powdered sugar until desired consistency is reached. Frost the cooled cake.
Tips for the Best Discard Carrot Cake
- Use freshly grated carrots for the best texture and flavor.
- Don't skip the discard! It adds depth and subtle tang without overpowering the cake.
- Frost only when cool to avoid melting the frosting.
- Optional add-ins: chopped pecans, walnuts, or raisins for texture.
A Sourdough Discard Recipe You’ll Come Back To
This sourdough discard carrot cake is more than just a clever way to reduce waste — it’s a rich, moist, and crowd-pleasing dessert. If you’ve been wondering what to do with your extra starter, this sourdough discard recipe proves that sourdough belongs in more than just bread.
From brunch tables to holiday spreads, this discard carrot cake earns a spot on the menu every time.
Love This Sourdough Carrot Cake?
Try these next:
sourdough discard carrot cake
With its outstanding textrure, sprice and sourdough flavor, this sourdough carrot cake has a perfectly moist crumb paired with delicous velvety maple cream cheese frosting, this is the very best carrot cake.
Ingredients
- 2½ cups all-purpose flour
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- 1 teaspoon salt
- 1½ teaspoon ground cinnamon
- ½ teaspoon ground nutmeg
- ½ teaspoon ground clove
- ½ teaspoon ground ginger
- 1⅓ cups melted butter
- 1½ cup packed brown sugar
- ½ cup granulated sugar
- 4 large eggs
- 2 teaspoons vanilla extract
- 3 cups grated carrots (about 5 whole carrots depending on the size)
- ½ apple sauce
- ½ cup sourdough discard, or active sourdough starter
- ½ cup crushed pecans (optional)
- For the Cream Cheese Frosting:
- 1 block cream cheese, room temperature
- 1 cup unsalted butter, softened
- 1 teaspoon vanilla extract
- 2 cups powdered sugar
- ½ maple syrup
- ½ cup crushed pecans (optional) to sprinkle on the top of the frosted cake
Instructions
Preheat the oven to 350°F (177°C). Grease and flour one 9x13 two or 9-inch cake pans,
Whisk the brown sugar, granulated sugar, butter, eggs, applesauce, sourdough discard and vanilla together in a large bowl until well combined.
In another large bowl, whisk the flour, baking powder, baking soda, salt, cinnamon, ginger, nutmeg, and cloves together.
Pour the wet ingredients into the dry ingredients and, using a rubber spatula or wooden spoon, fold the ingredients together until just combined.
Fold in the carrots and 1 cup of the pecans if desired. (The rest of the pecans are for garnish.)
Pour/spoon the batter evenly into the cake pans. If using two cake pans, bake for 30-35 minutes, if using one about 30 minutes (varies depending on your oven). Test the center with a toothpick. If it comes out clean, the cakes are done. If not, continue to bake until cooked through.
Do not over-bake.
Allow the cakes to cool completely in the pans set on a wire rack. The cakes must be completely cool before frosting and assembling.
Make the frosting: In a large bowl using a handheld or stand mixer fitted with a whisk or paddle attachment, beat the cream cheese and butter together on medium-high speed until smooth, about 2 minutes. Add the confectioners’ sugar, maple syrup, vanilla extract, and a pinch of salt.
Beat on low speed for 30 seconds, then increase to high speed and beat for 3 minutes until completely combined and creamy.
Add more confectioners’ sugar if frosting is too thin, a little milk if frosting is too thick, or an extra pinch of salt if frosting is too sweet. Frosting should be soft, but not runny.
