These Sourdough Discard Brownies started as a way to use up extra starter, but now it’s a family favorite. The mix of melted chocolate, cocoa, and brown butter makes them extra rich and fudgy. They always disappear faster than I expect.
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Why This Recipe Works
These Sourdough Discard Brownies became an instant favorite in our house. My kids could barely keep their hands off them long enough for me to take pictures, and after making them three more times, I can safely say my husband and kids are obsessed. Here’s what makes them special:
- Deep Chocolate Flavor: Browned butter, espresso powder, Dutch cocoa, melted semisweet chocolate, and chocolate chips give these brownies a bold, intense chocolate flavor. They have the same rich chocolatey comfort I love in my Double Chocolate Sourdough Bread.
- Extra Fudgy Texture: These brownies bake up with set, chewy edges and a soft, gooey center. For an even denser and fudgier texture, I like to chill them in the refrigerator for 1 to 2 hours before slicing.
- Perfect Use for Discard: The sourdough discard adds moisture and a subtle tang that balances all the sweetness without making the brownies taste sour. It’s an easy and delicious way to use extra starter, just like my Sourdough Discard Chocolate Chip Cookies.
- Simple to Make: There’s no complicated equipment or technique involved. Browning the butter adds extra flavor, and then the batter comes together with a few simple whisking and folding steps.
- Family Favorite: These brownies are so rich, fudgy, and packed with chocolate that they disappear quickly every time I make them. Serve them with a cold glass of milk for the kind of dessert both kids and adults will keep coming back for.
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Ingredients
- Butter – Browning the butter gives these brownies a nutty, rich flavor that deepens the chocolate taste. Use unsalted butter so you can control the salt level.
- Instant Espresso Powder – Enhances the chocolate flavor without making the brownies taste like coffee. You can leave it out if you prefer, but it adds great depth.
- Semisweet Chocolate – Melted into the batter for a glossy, dense texture. Use good-quality chocolate bars or chips for the best flavor.
- Eggs and Egg Yolk – The eggs provide structure and moisture, while the extra yolk adds richness and chewiness.
- Granulated Sugar – Creates sweetness and helps form that shiny, crackly top classic to brownies.
- Brown Sugar – Adds a touch of molasses flavor and extra moisture for a fudgy bite.
- Sourdough Discard – The key ingredient that adds a subtle tang and keeps the brownies moist. Use unfed discard straight from the fridge.
- All-Purpose Flour – Just enough to hold the brownies together without making them cakey.
- Dutch-Process Cocoa Powder – Gives a deep chocolate color and smooth, rich flavor. Regular cocoa works too, but Dutch-process makes them darker and more intense.
- Chocolate Chips – Folded in at the end for melty pockets of chocolate in every bite. You can use dark, milk, or a mix depending on your taste.
For full list of ingredients and instructions, see recipe card below.
Instructions
- Brown the Butter: Melt the butter in a saucepan until golden and fragrant, then stir in the espresso powder.
- Add the Chocolate: Stir in the oil and chopped chocolate until completely smooth, then let cool slightly.
- Whisk the Wet Ingredients: In a large bowl, whisk together the eggs, egg yolk, granulated sugar, brown sugar, and vanilla until glossy.
- Add the Sourdough: Whisk the sourdough discard into the egg mixture until fully incorporated.
- Combine the Batter: Stir in the melted chocolate mixture, then fold in the flour, cocoa powder, and salt until just combined.
- Fold in the Chocolate Chips: Gently mix in the chocolate chips until evenly distributed.
- Transfer and Bake: Spread the batter into a parchment-lined pan and bake until the edges are set and the center still has a slight wobble.
- Cool and Slice: Let the brownies cool completely before cutting into squares and serving.
For full list of ingredients and instructions, see recipe card below.
Substitutions & Variations
Here are some of my favorite substitutions and variations:
- Chocolate Options: I like using semisweet chocolate for balance, but dark chocolate makes them extra rich. You can also mix in milk chocolate chips for a sweeter bite.
- Mix-Ins: Try folding in chopped walnuts, pecans, or almonds for crunch. Swirl in peanut butter, caramel, or raspberry jam before baking for a fun change.
- Toppings: Sprinkle flaky sea salt on top before baking for a nice contrast. You can also drizzle melted chocolate or spread a thin layer of ganache once they’ve cooled.
What to Serve with Sourdough Discard Brownies
Classic Brownie Pairings
- These fudgy sourdough discard brownies are especially good with a cold glass of milk. The milk balances the deep chocolate flavor from the browned butter, espresso, cocoa powder, and melted chocolate.
- Serve a warm brownie with a scoop of vanilla or chocolate ice cream for an easy brownie sundae. Add whipped cream, chocolate sauce, caramel, or chopped nuts to make it feel like a special dessert.
Dessert Platters
- Cut the brownies into smaller squares and serve them alongside Sourdough Discard Chocolate Chip Cookies for a simple dessert platter. The chewy cookies and dense, fudgy brownies give everyone two classic chocolate treats to choose from.
- For a larger holiday or party spread, add slices of Double Chocolate Sourdough Bread or Sourdough Chocolate Chip Croissant Bread. These recipes carry the chocolate and sourdough theme through the entire dessert table.
FAQs
Can I use active sourdough starter instead of discard?
Yes, you can, but the texture may turn out slightly lighter since active starter has more bubbles. If you use active starter, reduce the amount slightly so the batter stays thick and fudgy.
Do I need to use espresso powder?
No, it’s optional. The espresso simply enhances the chocolate flavor without making the brownies taste like coffee, so you can leave it out if you prefer.
What kind of chocolate works best?
Semisweet chocolate gives a balanced flavor, but dark chocolate (60–70%) makes them richer. You can also mix in milk chocolate chips for a softer, sweeter bite.
How long do they keep?
Store the brownies in an airtight container at room temperature for up to 3 days or in the fridge for up to 5 days. They also freeze well for up to 2 months; just wrap them tightly and thaw at room temperature before serving. For the best fudgy texture, reheat gently or enjoy them chilled.
More Sourdough Recipes You’ll Enjoy
- Sourdough Chocolate Babka – The softest sourdough chocolate babka with rich chocolate swirls – made with wild yeast, no commercial yeast needed.
- Sourdough S’mores Bread – Sourdough S’mores Bread: A Campfire Treat in Loaf Form. The tangy depth of sourdough balances the sweetness of the classic s’mores ingredients.
- Sourdough Discard Bagels – These Sourdough Discard Bagels are chewy, golden, and full of flavor. A perfect way to use discard for a cozy, homemade breakfast.
- Sourdough Cornbread – Sourdough cornbread recipe is perfect for using up that extra sourdough discard in your fridge. The result is a moist, flavorful bread with just the right amount of sweetness.
If you try this Sourdough Discard Brownies recipe, let me know what you think! Rate and review this recipe in the comments below. Don’t forget to take a picture and tag me on Instagram @lizasfarmhouse!
Sourdough Discard Brownies
These Sourdough Discard Brownies started as a way to use up extra starter, but now it’s a family favorite. The mix of melted chocolate, cocoa, and brown butter makes them extra rich and fudgy. They always disappear faster than I expect.
Ingredients
Method
- Preheat the oven to 350°F and line an 8×8-inch baking pan with parchment paper.
- In a saucepan over medium heat, brown the butter until fragrant and golden. Remove from the heat, stir in the espresso powder until dissolved, then add the oil and chopped chocolate. Stir until smooth and let cool for 5 minutes.
- In a large bowl, whisk together the eggs, egg yolk, granulated sugar, brown sugar, and vanilla until glossy and well combined. Whisk in the sourdough discard.
- Pour the melted chocolate mixture into the egg mixture and stir until smooth.
- Add the flour, cocoa powder, and salt, folding gently until just combined. Fold in the chocolate chips.
- Spread the batter evenly into the prepared pan.
- Bake for 26–30 minutes, until the edges are set and the center still has a slight wobble.
- Let the brownies cool completely before slicing. For an extra fudgy texture, refrigerate for 1–2 hours before serving.
Notes
- Use room-temperature eggs so they blend smoothly into the batter and help create that glossy, crackly top.
- Brown the butter just until golden and nutty for a deeper, richer flavor that enhances the chocolate.
- Let the melted chocolate mixture cool slightly before adding it to the eggs to prevent curdling.
- Fold the dry ingredients gently to keep the brownies dense and fudgy rather than cakey.
- Line your pan with parchment paper for easy lifting and clean slicing once cooled.
- Check for doneness early. The center should still have a slight wobble when you remove the pan from the oven.
- Chill the brownies for 1–2 hours before cutting for the cleanest slices and the fudgiest texture.
- Use good-quality chocolate for the best flavor and melt. It makes a noticeable difference in richness.
- Sprinkle a little flaky sea salt on top before baking for a balanced sweet-salty finish.
- Store leftovers in an airtight container at room temperature for a few days or refrigerate for a firmer, chewy bite.
- Serve with a cold glass of milk or a scoop of vanilla ice cream. They’re rich enough on their own but even more irresistible with a creamy pairing.
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