Completely made from scratch, this homemade sourdough carrot cake is absolutely delicious. Super moist with the perfect amount of spice, it’s topped with a decadent cream cheese frosting. This is one of our favorite cakes.

two slices of sourdough carrot cake topped with cream cheese frosting and a few shredded carrots and chopped pecans on white plates on a white countertop

Iโ€™m always looking for ways to use up sourdough discard. Iโ€™m a firm believer that you should never just toss out your sourdough starter, but rather use it in a variety of different discard ways.

Why throw away good starter when you can make cake out of it? Am I right?

This sourdough carrot cake has all the classic carrot cake flavors and is topped with deliciously sweet cream cheese frosting. But wait – there’s a sourdough twist.

The sourdough not only adds another layer of flavor with the slight tanginess, but this recipe can also be long fermented so the grains are more broken down, making it easier to digest and the nutrients more bioavailable.

Also, this may be your kids’ new favorite way to eat carrots. I kid. 

overhead photo of sourdough carrot cake topped with cream cheese pecan frosting on a white countertop with a napkin and jars of shredded carrots and chopped pecans to the right

Why you will love this recipe:

Delicious: Super yummy spiced cake smothered in cream cheese frosting.

Can be long fermented: Struggle with eating non-fermented grains? No worries. You can ferment this recipe overnight so it is easier to digest.

Easy: It only takes a few minutes to mix this cake up for the oven. If you want to make it easier, put the carrots through the shredding blade on a food processor.

two square slices of sourdough carrot cake topped with cream cheese frosting and pecans on a white plates

Sourdough Carrot Cake Making Tips:

  • This cake can be made quick or long fermented for more health benefits.
  • Grate carrots by hand and donโ€™t use pre-shredded carrots. The pre-shredded carrots are too thick to bake nicely in cake.
  • Active sourdough starter or sourdough discard will work for this recipe, since the sourdough isnโ€™t used for rising, but rather for flavor and fermentation.
  • Allow the cake to cool completely before frosting. If you donโ€™t, you will be left with a melted soupy frosting mess.
  • Ensure the baking powder and baking soda are fresh. If they have been sitting in the back of the cabinet for a while and are past their prime, then the cake wonโ€™t rise properly.

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FAQ

side view of a sourdough carrot cake topped with cream cheese frosting gin a glass baking dish with a wooden utensil to the right

What does sourdough do for cakes?

It can help reduce the amount of gluten formation in the cake, which in turn helps the cake be more tender rather than tough and chewy. It can also add a depth of flavor to the cake with a wonderful, mild sourdough tang.

Can I use sourdough discard straight from the fridge?

Yes. As long as it has not been too long since feeding the starter, you can mix it up and use it.

jars of flour, sugar, salt, nuts, vanilla extract, and measuring cups on a white countertop

Ingredients:

Eggs

Oil โ€“ Preferably a healthy oil, like melted coconut oil or avocado oil.

Sugar โ€“ White granulated sugar

Brown sugar

Sourdough starterโ€“ Active or discard. New to sourdough? Learn how to make your own sourdough starter here.

Vanilla extract

All-purpose flour

Leaveners โ€“ Baking powder and baking soda

Salt

Cinnamon

Carrots โ€“ 3 large carrots

Pecans

Tools you may need:

Stand mixer

Box grater or food processor

9ร—13 baking dish or cake pans

Measuring cups and spoons

overhead photo of a sourdough carrot cake topped with cream cheese frosting in a a glass baking dish on a white countertop with a wooden spoon to the left

How To Make Sourdough Carrot Cake:

Preheat oven to 350 degrees. Grease a 9ร—13 inch pan or line with parchment paper.

Grate carrots and chop pecans. For easy grating, I suggest using a food processor with a grating attachment. A box grater will also do.

brown sugar, white sugar, oil, and sourdough starter in a bowl

In a large bowl, whisk together eggs, oil, white sugar, brown sugar, sourdough starter and vanilla.

a bowl of dry ingredient and another bowl of wet ingredients on a white countertop

In a separate bowl, mix the flour, baking soda, baking powder, salt and cinnamon. 

Add the dry ingredients into the wet ingredients until just incorporated. Try not to over mix.

shredded carrots and chopped pecans being added to sourdough carrot cake batter

Stir in carrots and fold in pecans.

hand stirring sourdough carrot cake batter with a wooden spatula

Pour into prepared pan.

bake sourdough carrot cake in a glass baking dish with two jars of shredded carrots and chopped pecans to the right

Bake in the preheated for 40 to 50 minutes.

Allow to cool before frosting.

close up picture of a square slice of sourdough carrot cake topped with cream cheese frosting, shredded carrots and pecans

Make It Long Fermented:

The Day Before:

Mix together oil, sourdough starter and flour. Cover and allow to ferment for 8-12 hours.

The Next Day 

Preheat oven to 350 degrees. Grease a 9ร—13 inch pan.

Whisk together eggs, brown sugar, white sugar, and vanilla.

Add to fermented dough.

Sprinkle over remaining dry ingredients and mix well.

Fold in grated carrots and chopped pecans.

Pour into prepared pans and bake for 40-50 minutes.

Allow to cool completely before frosting.

side view of sourdough carrot cake with cream cheese frosting in a glass baking dish with a wooden utensil covered with frosting to the right

How To Make Cream Cheese Frosting

To a stand mixer, add softened cream cheese and butter. Whip together for a few minutes.

Slowly pour in confectionersโ€™ sugar and vanilla. 

stand mixer with whisk attachment butter, cream cheese, and confectioners sugar

Whip until nice and fluffy.

chopped pecans on top of cream cheese frosting in a metal bowl

Fold in chopped pecans (optional).

Variations:

  • Swap out the pecans for chopped walnuts, pistachios, or sliced almonds.
  • Add orange zest for a brighter take. 
  • Add raisins.
  • Turn it into a trifle. Break up the cake and place in into a trifle dish, layering the cake with frosting. Yum!
  • Make them into sourdough carrot cake cupcakes. Make the recipe as stated before, but place them into lined muffin tins and bake for 18-22 minutes or until a toothpick comes out clean.

Find More Delicious Cake Recipes:

If you try this recipe and love it, I would love if you gave it 5 stars! Thank you! Tag me on Instagram @farmhouseonboone.

Sourdough Carrot Cake

4.47 from 126 votes
Super moist with the perfect amount of spice, it's topped with a decadent cream cheese frosting. This is one of our favorite cakes.
Prep: 10 minutes
Cook: 40 minutes
Total: 50 minutes
Servings: 12
close up picture of a square slice of sourdough carrot cake topped with cream cheese frosting, shredded carrots and pecans
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Ingredients 

  • 4 large eggs
  • 3/4 cup oil
  • 1 cup sugar
  • 1 cup brown sugar
  • 1/2 cup starter
  • 2 teaspoons vanilla
  • 2 cups all purpose flour
  • 2 teaspoons baking powder
  • 1 teaspoon baking soda
  • 1 teaspoon salt
  • 2 teaspoons cinnamon
  • 2 cups grated carrots, 3 large
  • 1 cup chopped pecans

Cream Cheese Frosting

  • 8 ounces cream cheese, softened โ€จ
  • 1/2 cup butter, softened โ€จ
  • 3 cups confectionersโ€™ sugarโ€จ
  • 1 teaspoon vanilla
  • 1 cup chopped pecans

Instructions 

  • Preheat oven to 350 degrees. Grease a 9ร—13 inch pan or line with parchment paper.
  • Grate carrots and chop pecans.
  • In a large bowl, whisk together eggs, oil, white sugar, brown sugar, sourdough starter and vanilla.
  • In a separate bowl, mix the flour, baking soda, baking powder, salt and cinnamon.
  • Add the dry ingredients into the wet ingredients until just incorporated. Try not to over mix.
  • Stir in carrots and fold in pecans.
  • Pour into prepared pan.
  • Bake in the preheated for 40 to 50 minutes.
  • Allow to cool before frosting.

Cream Cheese Frosting

  • To a stand mixer, add softened cream cheese and butter. Whip together for a few minutes.
  • Slowly pour in confectionersโ€™ sugar and vanilla.
  • Whip until nice and fluffy.
  • Fold in chopped pecans (optional).
  • Frost cooled cake.

Notes

  • This cake can be made quick or long fermented for more health benefits.
  • Grate carrots by hand and donโ€™t use pre-shredded carrots. The pre-shredded carrots are too thick to bake nicely in cake.
  • Active sourdough starter or sourdough discard will work for this recipe, since the sourdough isnโ€™t used for rising, but rather for flavor and fermentation.
  • Allow the cake to cool completely before frosting. If you donโ€™t, you will be left with a melted soupy frosting mess.

Nutrition

Calories: 756kcal | Carbohydrates: 89g | Protein: 8g | Fat: 43g | Saturated Fat: 11g | Polyunsaturated Fat: 9g | Monounsaturated Fat: 21g | Trans Fat: 0.4g | Cholesterol: 101mg | Sodium: 521mg | Potassium: 244mg | Fiber: 3g | Sugar: 66g | Vitamin A: 4155IU | Vitamin C: 1mg | Calcium: 111mg | Iron: 2mg

Nutrition information is automatically calculated, so should only be used as an approximation.

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4.47 from 126 votes (110 ratings without comment)

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Recipe Rating




88 Comments

  1. Audrey Patterson says:

    Can I use melted butter in place of oil? Or what oil is recommended for this recipe? Thank you!

    1. Lisa Bass says:

      Yes!

  2. Cindy says:

    Is long ferment placed on counter or should it be refrigerated ?
    Thanks!
    Cindy

  3. Susan Reynolds Maldarella says:

    Fantastic!!

  4. Jeff says:

    Can you make for a multi layer round cake ?

  5. Kim says:

    5 stars
    I made this recipe when I was canning carrots – I used the peels. It was fantastic! Do you think I could use this recipe with apples instead of carrots? If so, how much apple?

    1. Lisa Bass says:

      Yes, you should be able to. I’d use the same ratio.

  6. Frani says:

    4 stars
    Made this long fermented for about 8 hours. We made cupcakes and mini cupcakes and didnโ€™t use any icing to keep it low(er) sugar. Also didnโ€™t have pecans on hand so I made it without. I want to add more spice to it but Iโ€™m not quite sure exactly what to give it an extra lunch if flavor. It was sweet and hit the spot but I feel like itโ€™s lacking something. Perhaps it just needs to rest more overnightโ€ฆ I did eat it fresh out of the oven. lol
    Great recipe to work for a base!

  7. Sam B. says:

    5 stars
    I have made this recipe twice now and yum! The second time I added crystalized ginger and pecans – so tasty and a great way to use discard!

  8. Aleta says:

    5 stars
    The carrot cake I made with your recipe was amazing! So moist and flavourful, yet pretty easy too! Just one question. In the long 8+ hour fermentation case, are you sure the sourdough starter can work on the flour, given the presence of the oil? Iโ€™ve read elsewhere that oil inhibits the sourdough process. From a Quora thread:
    โ€œ Microbial Activity: The yeast and bacteria in a sourdough starter rely on sugars and moisture for growth. Oil can create a barrier that may hinder their access to these essential nutrients.โ€

    1. Lisa Bass says:

      It can inhibit the rising process, that is why baking powder and baking soda are used.

  9. Cherv says:

    Is the nutrition listed for one serving or the whole thing?

    1. Lisa Bass says:

      One serving!

  10. Nina says:

    If I long-ferment it, do I not add the baking powder and baking soda the next day? Teh directions don’t include those 2 so I want to be sure.

    1. Lisa Bass says:

      You will still need to add those two. The long fermentation is just for the grains to be more easily digested.