Enjoy this moist and tangy sourdough carrot cake recipe topped with a rich cream cheese frosting! Made with active sourdough starter and fermented overnight, this cake is full of depth of flavor, tender crumb, and cozy spice. Whether you’re baking for spring, fall, or any time of year, this is a sweet treat the whole family will love and will become your favorite carrot cake recipe.

This isn’t just another classic carrot cake recipe. This one is long-fermented using simple ingredients, including fresh carrots and warm spices, for a fluffy cake with a beautiful tang and texture. It’s one of my favorite cakes to make when I have leftover sourdough starter, and it’s easily adaptable into muffins or even a fun twist on sourdough carrot cake cookies or sourdough carrot cake bread.

More simple recipes for inspiration.

Perfect Sourdough Carrot Cake with Cream Cheese Frosting

Sourdough starter adds so much to baked goods—not just a subtle tang but moisture and a better texture. Paired with shredded carrot, warm cinnamon, and a thick layer of cream cheese frosting, it’s one of the best sourdough carrot cake recipes I’ve tried. This cake works well for brunch, Easter, birthdays, or just when you want to make something special for your people.

You can make this cake as a sheet cake, a round pan layer cake, or even as sourdough carrot cake muffins. And while this version uses a long ferment with active sourdough starter, you can also make a sourdough discard carrot cake by skipping the fermentation. Either way, it’s delicious.

If you're looking for more sourdough recipes, check out these Easy Homemade Sourdough Discard Bagels and White Chocolate Sourdough Discard Scone Recipe for more sourdough discard recipes

Tools You Will Need For This Recipe:

• Mixing Bowls: Large mixing bowl and medium mixing bowl

• 9×9 inch square pan (for a thicker, bakery-style cake) or a 9×13 inch rectangular pan (for a thinner sheet-style cake) or round cake pans

• Measuring cups and spoons

• Wooden Mixing Spoon or rubber spatula

• Whisk or stand mixer, electric mixer or even hand beaters

• Shredder: Box grater or food processor for grated carrots

• Cooling rack or wire rack

• Plastic wrap, parchment paper, or aluminum foil for covering and storing

• Airtight container for storage

• Oven Mitts

Make your own sourdough starter using this step-by-step guide

Sourdough Carrot Cake Tips:

• Carrots: Use fresh, finely grated carrots for the best texture.
• Mixing: Don’t overmix once flour is added.
• Sourdough starter discard: If using discard, ensure it’s not too sour. Young discard works best.
• Check that they’re done: Use a skewer or butter knife to check center before pulling your pan out of the oven.
• Check that they’re done: Use a skewer or butter knife to check center before pulling your loaf out of the oven.
• Don’t over bake or this recipe will turn out dry.
• Cooling: Let the cake cool fully before frosting to avoid runny frosting.
• Storage: Store leftover muffins in an air-tight container at room temperature to ensure freshness.
• Freezing: This recipe freezes great. You can thaw the muffins overnight in the refrigerator, and then warm in the oven for fresh muffins.

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Substitutions & Variations for Sourdough Carrot Cake

• Muffins: Make sourdough carrot cake muffins instead of cake: bake for 18–22 minutes.
• Orange Zest: Add orange zest for brightness.
• Nuts: mix in chopped walnuts, crunchy pecans, almonds to the batter before adding to pan or muffin tins.
• Spices: Add extra of each of the spices for a cozier, spicer carrot cake.
• Applesauce: Swap in applesauce for part of the oil.
• Raisins: Add raisins for a dried fruit add-in.
• Whole Wheat Flour: Swap the all purpose flour for whole wheat flour for a heartier texture.
• Love experimenting? You’ll also enjoy my sourdough chocolate cake, sourdough apple cake, or sourdough zucchini bread!

Try this Cinnamon Sugar Sourdough Bread Recipe

Ingredients You’ll Need:

Here’s a quick list of the simple ingredients you’ll need to make this delicious sourdough carrot cake. The best part is that most are pantry staples:

Fermented Base:

• Flour: I used all-purpose flour, but you can also use whole wheat flour or bread flour.
• Sourdough Starter or Sourdough Discard: The instructions are for active sourdough starter. You can use leftover sourdough discard as well. See recipe card.
• Milk
• Oil: vegetable or melted coconut oil

Wet Ingredients:

• Eggs
• Sugar
• Brown Sugar: you can also use dark brown sugar. Substitute 1:1
• Vanilla Extract : homemade or store-bought
• Cinnamon
• Nutmeg
• Salt 
• Baking Soda
• Baking Powder
• Grated Carrots

Cream Cheese Frosting Ingredients:

• Cream Cheese, softened
• Unsalted Butter, softened
• Vanilla Extract
• Powdered Sugar
• Pinch of Salt (optional)

How To Make Sourdough Carrot Cake

Day 1 – Mix and Ferment

1. In a medium mixing bowl, combine the active 3/4 cup sourdough starter, milk, oil, and flour.
2. Mix well to form a soft dough or thick batter.
3. Cover tightly with plastic wrap or a beeswax wrap and let ferment at room temperature for 8–12 hours.

Day 2 – Mix and Bake

1. Preheat your oven to 350°F (175°C). Grease a 9×9” pan or line with parchment paper.
2. In a separate large bowl, whisk together white sugar, brown sugar, eggs, and vanilla until light and smooth.
3. Stir this wet mixture into the fermented base. Mix on low speed with a stand mixer or use a wooden spoon. Some lumps are okay.
4. In a separate bowl, whisk together the dry ingredients: spices, salt, baking powder, and baking soda.
5. Add this dry mix to the cake batter and stir gently to combine. Don’t overmix.
6. Fold in fresh carrots and optional crunchy pecans or orange zest.
7. Pour into the prepared pan and smooth the top.
8. Bake for 40–45 minutes, or until a toothpick inserted in the center comes out clean.
9. Let the cake cool in the pan for 10–15 minutes, then transfer to a cooling rack to cool completely before frosting.

Classic Cream Cheese Frosting

1. Beat cream cheese and butter until fluffy on medium speed.
2. Add vanilla, powdered sugar, and pink of salt and beat until smooth and spreadable.
3. Spread generously over the cooled cake for that rich cream cheese frosting finish.

Related Post: Easy, Fluffy Sourdough Discard Banana Muffins

Serving & Storage Tips for Sourdough Carrot Cake

These simple storage tips will help you sourdough carrot cake last long and taste fresh.

• Serve plain or with frosting. The sweetness of the cake works either way!
• Store frosted cake in an airtight container in the fridge for up to 5 days.
• Unfrosted cake freezes well. Wrap in aluminum foil and freeze up to 2 months.

FAQs about this Sourdough Recipe

Can I make this carrot cake into muffins?

Yes, you can. You can make 12 large muffins or 24 medium muffins. Bake for 18–22 minutes or until middles are cooked through. You can also turn these into smaller muffins by using this silicone mini muffin pan that is amazing!

Can I turn this recipe into sourdough discard carrot cake?

Yes! To make sourdough discard carrot cake, don’t want to ferment the batter overnight, just use unfed sourdough discard in place of active starter. Skip the fermentation step and mix everything on the same day. It still adds moisture and a mild tang but won’t rise quite as much.

Do I have to ferment the sourdough carrot cake batter overnight?

No, it’s optional but highly recommended. Fermenting the batter with an active sourdough starter improves flavor, texture, and digestibility. If you’re short on time, you can make it the same day with fresh or discard starter, but you’ll miss out on some of that classic sourdough depth and flavor.

What’s the best way to grate carrots for carrot cake?

Use finely grated carrots for the best texture. A box grater or food processor with a shredding blade works great. Avoid pre-shredded carrots. They’re too dry and chunky for this moist cake.

What oil works best?

I use vegetable oil or avocado oil, but olive oil or coconut oil are also great for added flavor.

Enjoy this Classic Recipe

This just might be the best sourdough carrot cake recipe if you’re looking for something cozy, moist, and full of classic carrot cake flavors like warm spices and rich cream cheese frosting. I love how sourdough adds a subtle tang that sets it apart from different recipes I’ve tried over the years. This recipe is a keeper for sure.

There’s something so nostalgic about a good carrot cake sourdough recipe. Whether you’re making this as a long-fermented version with active sourdough starter, or turning it into a sourdough discard recipe, it’s the kind of sweet treat that brings joy to the table.

From one home cook to another, I hope you enjoy this recipe!

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