The irresistible goodness of this sourdough marble loaf cake is truly amazing. With a slight tang from the sourdough blended with the sweet vanilla and rich chocolate making this treat perfect for a tea party, special brunch, or a surprise treat for your family. The texture is moist and tender, adding to the overall enjoyment of this simple yet delicious cake. 
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Tools you might need:
Ingredients:
- Sourdough starter: You can use fed or unfed sourdough starter. It adds the slight tangy flavor to the cake along with contributing to the leavening of the batter.
- Butter: Butter adds richness and moisture to the cake. Softened unsalted butter is easier to incorporate into the batter.
- Granulated sugar: Sugar sweetens the cake and contributes to its texture. It also aids in browning during baking.
- Eggs: Eggs act as a binding agent and provide structure to the cake. They also contribute to moisture and richness.
- Vanilla extract: Vanilla extract enhances the overall flavor of the cake, adding a sweet and aromatic note.
- Greek yogurt: Greek yogurt adds moisture and a creamy texture to the cake. It also contributes a subtle tanginess.
- Salt:Salt enhances the flavor of the other ingredients, balancing the sweetness and providing depth.
- Baking powder: Baking powder helps the cake rise, creating a light and fluffy texture. I recommend Bob’s Red Mill Baking Powder.
- Flour: Flour is a basic structural component. King Arthurs All- Purpose Flour or King Arthurs Bread Flour will work.
- Unsweetened cocoa powder: Cocoa powder gives the chocolate portion of the cake its rich flavor and deep color.
How to make sourdough marble loaf cake:
Mix wet ingredients:
- In the kitchen aid mixer cream the 2/3 cup softened butter with 2/3 cup granulated sugar. Mix for 3 minutes on medium speed until light and creamy.
- Add in 3 eggs. Mix for 1 minute.
- Next add 1 tsp vanilla and 60 grams Greek yogurt. Mix for 1 minute.
- Add in 1/2 cup sourdough starter and mix for 1 minute.
- Divide the wet ingredients mixture in two portions. Set aside.
Mix Dry Ingredients (Vanilla):
- In a separate mixing bowl measuring out 105 grams flour, 1 tsp baking powder, 1/4 tsp salt.
- Whisk and set aside.
Mix Dry Ingredients (Chocolate):
- In a separate mixing bowl measuring out 80 grams flour, 25 grams unsweetened cocoa powder, 1 tsp baking powder, 1/4 tsp salt.
- Whisk and set aside.
Make batter:
- Add the dry vanilla ingredients into one half of the wet ingredients.
- Mix well to incorporate and hydrate the dry ingredients.
- In a separate bowl add the chocolate dry ingredients with the second half of the wet ingredients.
Assemble:
- Butter the inside of the loaf pan or line with parchment paper.
- Pour 3/4 of the vanilla batter first and spread evenly. Using a knife make a zig zag in the batter to create more of the marble effect. Do not over mix or the chocolate and vanilla will mix into one batter color.
- Add 3/4 of the chocolate batter next and spread evenly. Using a knife make a zig zag in the batter to create more of the marble effect.
- Spread the remaining 1/4 of the vanilla batter and using a knife make a zig zag in the batter to create more of the marble effect.
- Add the remaining 1/4 chocolate and using a knife make a zig zag in the batter to create more of the marble effect.
Bake:
- Preheat your oven to 350°F.
- Bake the cake for 45 min or until a toothpick or knife comes out clean when placed in the middle.
- Cool, slice, and serve.
How to store sourdough marble loaf cake:
Store in an airtight container for up to 2 days in the fridge.
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If you tried this recipe and love it, please come back and give it a review or a comment. Tag me on IG @shakanranch
Sourdough Marble Loaf Cake
The irresistible goodness of this sourdough marble loaf cake is truly amazing. With a slight tang from the sourdough blended with the sweet vanilla and rich chocolate making this treat perfect for a tea party, special brunch, or a surprise treat for your family. The texture is moist and tender, adding to the overall enjoyment of this simple yet delicious cake.
Equipment
- Kitchen Aid Mixer
- Mixing bowls
- Loaf pan
- Whisk
- Parchment Paper
Ingredients
Wet ingredients:
- 1/2 cup sourdough starter
- 1.5 sticks unsalted butter softened (2/3 cup)
- 2/3 cup granulated sugar
- 3 large eggs
- 1 teaspoon vanilla extract
- 60 grams greek yogurt
Vanilla Dry Ingredients:
- 105 g flour
- 1 teaspoon baking powder
- 1/4 teaspoon salt
Chocolate Dry Ingredients:
- 25 g unsweetened cocoa powder
- 80 g flour
- 1 tsp baking powder for chocolate
- 1/4 tsp salt
Instructions
Mix wet ingredients:
- In the kitchen aid mixer cream the 2/3 cup softened butter with 2/3 cup granulated sugar. For 3 minutes on medium speed until light and creamy.
- Add in 3 eggs. Mix for 1 minute.
- Next add 1 tsp vanilla and 60 grams Greek yogurt. Mix for 1 minute.
- Add in 1/2 cup sourdough starter and mix for 1 minute.
- Divide the wet ingredients mixture in two portions. Set aside.
Mix Dry Ingredients (Vanilla):
- In a separate mixing bowl measuring out 105 grams flour, 1 tsp baking powder, 1/4 tsp salt.
- Whisk and set aside.
Mix Dry Ingredients (Chocolate):
- In a separate mixing bowl measuring out 80 grams flour, 25 grams unsweetened cocoa powder, 1 tsp baking powder, 1/4 tsp salt.
- Whisk and set aside.
Make batter:
- Add the dry vanilla ingredients into one half of the wet ingredients.
- Mix well to incorporate and hydrate the dry ingredients.
- In a separate bowl add the chocolate dry ingredients with the second half of the wet ingredients.
Assemble:
- Butter the inside of the loaf pan or line with parchment paper.
- Pour 3/4 of the vanilla batter first and spread evenly. Using a knife make a zig zag in the batter to create more of the marble effect. Do not over mix or the chocolate and vanilla will mix into one batter color.
- Add 3/4 of the chocolate batter next and spread evenly. Using a knife make a zig zag in the batter to create more of the marble effect.
- Spread the remaining 1/4 of the vanilla batter and using a knife make a zig zag in the batter to create more of the marble effect.
- Add the remaining 1/4 chocolate and using a knife make a zig zag in the batter to create more of the marble effect.
Bake:
- Preheat your oven to 350°F.
- Bake for 45 min or until a toothpick or knife comes out clean when placed in the middle.
- Cool, slice, and serve.
