Sourdough Discard Brownies: Fudgy, Rich, and Zero-Waste

If you’re nurturing a sourdough starter, chances are you’ve got discard piling up. Instead of tossing it, why not turn it into something irresistible — like sourdough discard brownies? These brownies are the perfect way to reduce waste while satisfying your chocolate cravings.

Sourdough discard adds a subtle tang and creates an ultra-moist, chewy texture that regular brownies often lack. It doesn’t make them taste “sour” — rather, it enhances the chocolate flavor and gives the brownies a rich, almost complex finish. Plus, it’s a great way to sneak a little fermentation goodness into your dessert.

Whether you’re deep into sourdough baking or just getting started, this is a recipe you’ll want to keep in your back pocket. It’s fast, easy, and gives your discard a delicious second life.

🕒 Cooking Time & Yield

• Prep Time: 15 minutes

• Bake Time: 30–35 minutes

• Cooling Time: 15–20 minutes

• Total Time: ~1 hour

• Yields: 16 brownies (standard 8×8-inch pan)

🍫 Ingredients for Sourdough Discard Brownies

• 1/2 cup (113g) unsalted butter

• 1 cup (200g) granulated sugar

• 1/2 cup (100g) brown sugar

• 3/4 cup (65g) unsweetened cocoa powder

• 1/2 tsp salt

• 1 tsp vanilla extract

• 2 large eggs

• 1/2 cup (120g) sourdough discard (unfed, 100% hydration)

• 1/2 cup (60g) all-purpose flour

• 1/2 tsp baking powder

• 1/2 cup (90g) chocolate chips or chopped dark chocolate (optional)

👩‍🍳 How to Make Sourdough Discard Brownies

Step 1: Preheat and Prepare

Preheat your oven to 350°F (175°C). Grease or line an 8×8-inch baking pan with parchment paper.

Step 2: Melt Butter & Mix Base

In a medium saucepan (or microwave-safe bowl), melt the butter. Remove from heat and stir in both sugars and cocoa powder. Mix until smooth.

Step 3: Add Eggs & Vanilla

Whisk in eggs, one at a time, until fully incorporated. Add vanilla extract and mix well.

Step 4: Stir in Sourdough Discard

Add the sourdough discard and stir until fully combined. The mixture may look a bit thick and glossy — that’s perfect.

Step 5: Add Dry Ingredients

In a small bowl, whisk together flour, salt, and baking powder. Gently fold into the wet mixture. Do not overmix.

Step 6: Add Chocolate (Optional)

Fold in chocolate chips or chunks for extra richness.

Step 7: Bake

Pour the batter into your prepared pan and smooth the top. Bake for 30–35 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

Step 8: Cool & Slice

Allow brownies to cool in the pan for at least 15 minutes before slicing. They will firm up as they cool.

📝 Notes

• Sourdough Discard: Use discard that hasn’t been flavored or salted. 100% hydration (equal parts flour and water) is best.

• Don’t Overbake: Slight underbaking keeps them fudgy. They continue to cook as they cool.

• Flavor Variations: Add a pinch of espresso powder for deeper chocolate flavor, or a swirl of peanut butter for a twist.

• Storage: Store in an airtight container at room temperature for up to 4 days, or freeze for longer storage.

❓ FAQs

Can I use active sourdough starter instead of discard?

Yes, but there’s no need to feed it first. The starter’s purpose here is mostly texture, not leavening.

Will the brownies taste sour?

No — the small amount of discard adds a slight tang but enhances the chocolate flavor rather than overpowering it.

Can I make this gluten-free?

Yes, use a 1:1 gluten-free all-purpose flour blend. Texture may vary slightly.

What if I don’t have brown sugar?

You can use all granulated sugar, but brown sugar adds moisture and depth.

Can I double the recipe?

Yes, just use a 9×13-inch pan and bake for 35–40 minutes, checking with a toothpick.

🧾 Nutrition Information (Per Brownie – 1 of 16)

Note: Values are approximate and will vary based on specific ingredients used.

⚠️ Disclaimer

These brownies are intended for occasional enjoyment as part of a balanced diet. They contain gluten, eggs, and dairy — common allergens — so please check all ingredients and consult with a medical professional if you have food allergies or health concerns. Always enjoy desserts in moderation.