If you’ve ever found yourself with an extra sourdough starter, wondering what to do with it, then you’re in the right place. Today, we’re introducing a delightful twist on the classic brownie—Sourdough Brownies. This recipe combines the rich, fudgy texture of traditional brownies with the tangy depth of sourdough starter, creating a dessert that’s both indulgent and intriguing.
Why We Love This Sourdough Brownies Recipe
A New Twist on a Timeless Classic
Brownies are one of those desserts that everyone loves, but the sourdough twist takes it to a new level. The mild tang of the sourdough starter enhances the chocolatey richness and adds a unique depth of flavor that you won’t find in traditional brownies. It’s the perfect combination of comfort and surprise.
Rich, Fudgy Texture
Thanks to the sourdough starter, these brownies are extra moist and dense, with a slightly chewy texture that melts in your mouth. If you’re a fan of brownies that are thick and gooey in the middle, these will not disappoint.

Great for Using Up Extra Sourdough Starter
If you’re a sourdough baker, you know how quickly a starter can accumulate. Instead of discarding your extra sourdough starter, you can put it to delicious use in this brownie recipe. It’s an easy, creative way to use up what might otherwise go to waste.
Simple to Make with Minimal Ingredients
Despite their impressive flavor, these sourdough brownies require only a handful of common ingredients, making them an accessible and hassle-free treat. You don’t need to be a professional baker to pull these off, yet the result is something that tastes like it came from a gourmet bakery.
Ingredients
To create these irresistible brownies, here’s what you’ll need:
Sourdough starter – Adds tangy flavor, don’t substitute it with anything else.
Unsalted butter – Adds moisture and richness; can substitute with salted butter (reduce added salt).
Sugar – Balances the tang from the sourdough.
All-purpose flour – Provides structure; don’t swap for whole wheat.
Unsweetened cocoa powder – Gives chocolate flavor; don’t use sweetened cocoa.
Baking powder – Helps with slight rising; don’t use baking soda.
Eggs – Bind everything together and add richness.
Vanilla extract – Adds depth to the flavor.
Chocolate chips (optional) – For extra chocolatey goodness.
How to Make Sourdough Brownies
Follow these simple steps to create your very own batch of sourdough brownies:
Step 1: Preheat Your Oven
Before you get started with mixing, preheat your oven to 350°F (175°C). Grease a 9×9-inch baking pan to ensure your brownies come out easily once they’ve finished baking.
Step 2: Mix Wet Ingredients
In a large mixing bowl, combine the melted butter and sugar. Beat them together until the mixture is smooth and creamy. Then, add in your eggs one at a time, making sure to beat well after each addition. Lastly, stir in the vanilla extract and your active sourdough starter, ensuring everything is well combined.
Step 3: Prepare Dry Ingredients
In a separate bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking powder, and salt. This helps evenly distribute the dry ingredients and prevents any lumps from forming when you combine them with the wet ingredients.
Step 4: Combine Wet and Dry Ingredients
Gradually add the dry mixture to the wet ingredients, stirring gently as you go. Be careful not to overmix the batter—just fold until everything is incorporated. Overmixing can lead to dense, tough brownies, and you want them to stay light and fudgy.
Step 5: Add Chocolate Chips (Optional)
For an extra indulgent treat, fold in the chocolate chips. These will melt into the batter as it bakes, creating pockets of gooey chocolate throughout the brownies.
Step 6: Bake Your Brownies
Pour the batter into your prepared pan and smooth it into an even layer. Place it in the preheated oven and bake for 25-30 minutes. You’ll know the brownies are done when a toothpick inserted into the center comes out clean or with just a few moist crumbs. The brownies will continue to set as they cool, so don’t worry if they seem a little soft when you first take them out.
Step 7: Cool and Serve
Allow the brownies to cool completely in the pan before cutting them into squares. This will ensure they hold together nicely and give you those perfect brownie edges everyone loves.
Expert Tips for Perfect Sourdough Brownies
Use an Active Sourdough Starter
To achieve the best flavor and texture, make sure your sourdough starter is active and bubbly. If you’re not sure whether it’s active, you can test it by dropping a spoonful into a glass of water. If it floats, it’s good to use. If it sinks, give your starter a feeding and wait for it to become bubbly again.
Don’t Overmix the Batter
While it’s tempting to keep stirring, avoid overmixing the brownie batter. Overmixing can introduce too much air into the mixture, making the brownies cakier than intended. Instead, mix just until everything is incorporated.
Check for Doneness Carefully
Brownies can sometimes look like they need a little more time in the oven, but they’ll firm up as they cool. To check for doneness, insert a toothpick into the center of the brownies. It should come out clean or with just a few moist crumbs attached.
Store Properly for Maximum Freshness
Store your brownies in an airtight container at room temperature for up to 4 days. If you need to keep them longer, you can freeze them for up to 3 months. Simply wrap the brownies tightly in plastic wrap or foil and place them in a freezer-safe bag.
Variations of Sourdough Brownies
If you’re feeling adventurous, here are some variations to try:
Add Nuts
Chopped nuts, such as walnuts, pecans, or almonds, are a great addition to sourdough brownies. They add texture and a nutty flavor that complements the rich chocolate.
Spicy Sourdough Brownies
For a fun twist, add a pinch of cayenne pepper or chili powder to the batter. The spice will contrast beautifully with the sweetness of the chocolate, creating a warm and satisfying flavor profile.
Dairy-Free Version
You can easily make these brownies dairy-free by swapping the butter for coconut oil and using dairy-free chocolate. This makes the brownies suitable for anyone with lactose intolerance or a dairy allergy.
Serving Sourdough Brownies
Sourdough brownies are delicious on their own, but they’re even better when paired with the right sides. Here are some ways to serve them:
Serve with Ice Cream
For the ultimate indulgence, serve your brownies warm with a scoop of vanilla or chocolate ice cream. The cold creaminess of the ice cream pairs perfectly with the rich, fudgy brownies.
Top with Fresh Berries
Fresh raspberries or strawberries add a lovely contrast to the sweetness of the brownies. Their tartness balances the richness of the chocolate, making for a sophisticated dessert.
Pair with Coffee or Tea
A freshly brewed cup of coffee or a hot tea makes an excellent beverage pairing with sourdough brownies. The warmth of the drink complements the rich chocolate flavors, creating a comforting treat for any time of day.
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FAQs About Sourdough Brownies Recipe
What makes sourdough brownies different from regular brownies?
Sourdough brownies have a distinct tangy flavor thanks to the sourdough starter. This tanginess adds depth to the chocolate flavor and makes the brownies taste more complex compared to traditional brownies.
Can I use a non-active sourdough starter in this recipe?
It’s best to use an active sourdough starter for the best flavor and texture. An inactive starter may not provide the right rise or tang, affecting the outcome of the brownies.
Can I substitute sourdough starter with sourdough bread?
While you can experiment with sourdough bread, using an active sourdough starter is the best choice for getting the right rise and flavor. Bread may not yield the same results.
What are the best toppings for sourdough brownies?
Popular toppings for sourdough brownies include whipped cream, ice cream, or fresh fruit. A dusting of powdered sugar is also a simple but delightful finishing touch.

Sourdough Brownies recipe
Ingredients
- 1/2 cup sourdough starter active and bubbly
- 1/2 cup butter melted
- 1 cup sugar can use granulated or brown sugar
- 2 large eggs
- 1 cup all-purpose flour
- 1/2 cup unsweetened cocoa powder
- 1/2 tsp baking powder
- 1/4 tsp salt
- 1 tsp vanilla extract
- 1/2 cup chocolate chips optional
Instructions
- Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking pan.
- In a large mixing bowl, combine the melted butter and sugar. Beat them together until smooth. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract and sourdough starter.
- In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
- Gradually add the dry ingredients to the wet ingredients, folding gently until just incorporated. Be careful not to overmix.
- If using, fold in the chocolate chips.
- Pour the batter into the prepared pan, smoothing it out evenly. Bake for 25-30 minutes, until a toothpick inserted in the center comes out clean with just a few moist crumbs.
- Allow the brownies to cool completely in the pan before cutting into squares.