The Super Fudgy Sourdough Brownies Recipe You Must Try
- Joao Nsita
- 7 days ago
- 7 min read

In the ever-evolving world of baking, enthusiasts are continually seeking innovative ways to reduce food waste while indulging in delectable treats. One such trend that has captured the hearts of bakers worldwide is the incorporation of sourdough starter discard into classic recipes. Leading this movement is the Super Fudgy Sourdough Brownies recipe, celebrated for its rich, chocolatey flavor and ultra-moist texture. This delightful dessert not only satisfies your sweet tooth but also offers a sustainable solution to repurposing sourdough discard, making it a must-try in your baking repertoire.
Why You’ll Love This Recipe
Before diving into the details, here’s why this recipe deserves a spot in your kitchen:
Sustainability: Utilizes sourdough discard, reducing food waste and giving it a delicious purpose.
Rich Flavor: The combination of melted chocolate and cocoa powder delivers an intense chocolate experience.
Perfect Texture: Achieves a dense, fudgy interior with a delicate, crackly crust.
Versatility: Easily customizable with various mix-ins to suit your preferences.
Simplicity: Requires basic ingredients and straightforward steps, making it accessible for bakers of all levels.
Ingredients & Substitutions
To create these mouthwatering brownies, gather the following ingredients:
Core Ingredients:
Unsalted Butter: 1 cup (227g), cut into piecesSubstitution: Salted butter can be used; omit additional salt in the recipe. For a dairy-free version, use plant-based butter.
Semisweet Chocolate Chips: 2 cups (340g)Substitution: Dark chocolate chips or chopped chocolate bars work well. For a dairy-free option, choose dairy-free chocolate chips.
Granulated Sugar: 1½ cups (300g)Substitution: Coconut sugar or light brown sugar can be used for a deeper flavor.
Large Eggs: 4, at room temperatureSubstitution: For an eggless version, use flax eggs (1 tablespoon ground flaxseed mixed with 3 tablespoons water per egg).
Vanilla Extract: 2 teaspoonsSubstitution: Almond extract or coffee extract can provide a unique twist.
Sourdough Starter Discard: 1 cup (240g), unfedSubstitution: A mixture of equal parts flour and water can mimic the consistency, though it won’t impart the same tangy flavor.
Unsweetened Cocoa Powder: ½ cup (43g)Substitution: Dutch-processed cocoa can be used for a milder taste.
Salt: ½ teaspoonSubstitution: If using salted butter, omit this addition.
Optional Add-ins:
Chopped nuts (e.g., walnuts, pecans)
Chocolate chunks
Dried fruits (e.g., cherries, cranberries)
These substitutions make the recipe adaptable to various dietary preferences while maintaining its core flavors.
Step-by-Step Instructions
1. Preheat the Oven
Set your oven to 350°F (175°C). Grease a 9x13-inch baking pan and line it with parchment paper, allowing excess to hang over the edges for easy removal.
2. Melt Butter and Chocolate
In a heatproof bowl, combine the butter and semisweet chocolate chips. Melt them together using a double boiler or microwave in 30-second intervals, stirring until smooth.Pro Tip: Avoid overheating to prevent the chocolate from seizing. Stirring continuously helps achieve a silky consistency.
3. Incorporate Sugar
Remove the melted mixture from heat and whisk in the granulated sugar until fully dissolved.Pro Tip: Adding sugar while the mixture is warm helps it dissolve better, leading to a smoother batter.
4. Add Eggs and Vanilla
Allow the mixture to cool slightly before adding the eggs one at a time, whisking well after each addition. Stir in the vanilla extract.Pro Tip: Ensuring the mixture isn’t too hot prevents the eggs from curdling.
5. Incorporate Sourdough Starter
Gently fold in the sourdough starter discard until the batter is smooth and uniform.Pro Tip: The starter should be at room temperature to blend seamlessly.
6. Sift in Dry Ingredients
Sift the unsweetened cocoa powder and salt into the batter, folding gently until no dry streaks remain.Pro Tip: Sifting prevents lumps and ensures even distribution of cocoa.
7. Add Optional Mix-ins
If desired, fold in chopped nuts, additional chocolate chunks, or dried fruits for added texture and flavor.
8. Bake
Pour the batter into the prepared pan, spreading it evenly. Bake for 28-32 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.Pro Tip: Avoid overbaking to maintain the fudgy texture. The brownies will continue to set as they cool.
9. Cool and Serve
Let the brownies cool completely in the pan on a wire rack. Once cooled, use the parchment overhang to lift them out, slice into squares, and enjoy.Pro Tip: For cleaner cuts, chill the brownies in the refrigerator for 30 minutes before slicing.
Common Mistakes & Troubleshooting
While this recipe is straightforward, there are a few pitfalls to watch out for:
Overmixing: Excessive mixing can incorporate too much air, altering the dense, fudgy texture. Stir just until ingredients are combined.
Overbaking: Overbaked brownies lose their signature fudginess. Check for doneness early to ensure a moist interior.
Cold Ingredients: Using cold eggs or sourdough starter can cause the batter to seize. Bring all ingredients to room temperature beforehand.
Skipping Parchment Paper: Without parchment, removing the brownies from the pan becomes difficult. Always line your pan for stress-free cutting.
Not Cooling Completely: Cutting into warm brownies can result in messy slices. Patience is key!

Conclusion
The Super Fudgy Sourdough Brownies recipe is a game-changer in the world of sustainable baking. By transforming leftover sourdough discard into a decadent dessert, you not only reduce food waste but also create a treat that’s rich, indulgent, and deeply satisfying. These brownies strike the perfect balance between gooeyness and structure, offering a melt-in-your-mouth experience with every bite. Whether you’re a seasoned baker or a beginner, this recipe is simple enough to master yet impressive enough to wow any crowd. So grab your sourdough starter, preheat that oven, and prepare to fall in love with these irresistible brownies.
FAQs
Can I use fed sourdough starter instead of discard?Yes, but the texture may vary slightly. Discard provides a thicker consistency ideal for brownies.
What if my sourdough starter is too thin?Thicken it by letting it sit uncovered for a few hours or adding a bit of flour to reach the desired consistency.
How do I store leftovers?Store brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.
Can I freeze these brownies?Absolutely! Wrap individual portions in plastic wrap and freeze for up to 3 months. Thaw at room temperature before serving.
Why did my brownies turn out cakey?Overmixing or adding too many eggs can lead to a cakier texture. Stick to the recipe measurements and mix gently.
Can I double the recipe?Yes, simply double all ingredients and bake in a larger pan or multiple pans, adjusting the baking time as needed.
Do I need to sift the cocoa powder?While optional, sifting ensures a lump-free batter and improves the overall texture.
What’s the best way to cut clean brownie squares?Chill the brownies before slicing and use a sharp knife, wiping it clean between cuts for neat results.
Can I omit the optional add-ins?Yes, the base recipe is delicious on its own, but add-ins enhance flavor and texture.
Can I use gluten-free flour for the sourdough starter substitute?Yes, a gluten-free flour blend works fine if you’re mimicking the starter consistency.
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