Sourdough Discard Brownies Peanut Butter

There's something wonderfully resourceful about transforming sourdough discard into a decadent dessert. These fudgy brownies marry the tangy depth of unfed starter with rich chocolate and creamy peanut butter swirls, creating a treat that's both indulgent and practical. Whether you're a seasoned sourdough baker looking to reduce waste or simply craving a moist, intensely chocolatey brownie, this recipe delivers on all fronts.

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The sourdough discard doesn't just reduce waste—it adds moisture and a subtle tang that enhances the chocolate flavor without making the brownies taste sour. Combined with melted butter and chocolate, plus that gorgeous peanut butter swirl on top, these brownies strike the perfect balance between chewy edges and a fudgy center. They're vegetarian-friendly and make 16 generous servings, perfect for sharing or freezing for later.

Ingredients

• Chocolate & Butter: 115 g (1/2 cup) unsalted butter, 170 g (1 cup) semisweet chocolate chips or chopped chocolate
• Wet Ingredients: 120 g (1/2 cup) sourdough discard (unfed), 200 g (1 cup) granulated sugar, 2 large eggs, 1 tsp vanilla extract
• Dry Ingredients: 65 g (1/2 cup) all-purpose flour, 30 g (1/4 cup) unsweetened cocoa powder, 1/2 tsp fine sea salt
• Swirl: 80 g (1/3 cup) creamy peanut butter, 1 tbsp powdered sugar (optional, for a sweeter swirl)

Instructions

Step 1

Preheat your oven to 175°C (350°F). Line a 20x20 cm (8x8 inch) square pan with parchment paper.

Step 2

In a microwave-safe bowl, melt the butter and chocolate together in 30-second bursts, stirring until smooth. Let cool for 3 minutes.

Step 3

In a large bowl, whisk together the sourdough discard, sugar, eggs, and vanilla until well combined.

Step 4

Pour the melted chocolate mixture into the bowl and whisk until smooth.

Step 5

Sift in the flour, cocoa powder, and salt. Mix gently with a spatula until just combined—do not overmix.

Step 6

Pour the batter into the prepared pan and smooth the top.

Step 7

In a small bowl, stir together peanut butter and powdered sugar (if using) until smooth. Drop spoonfuls of the peanut butter mixture over the brownie batter. Use a skewer or knife to gently swirl the peanut butter into the batter.

Step 8

Bake for 28–32 minutes, or until the center is just set and a toothpick comes out with moist crumbs.

Step 9

Let cool completely in the pan before slicing into squares.

Zusatztipps für die Zubereitung

The key to perfectly fudgy brownies is not overbaking. Watch carefully after 28 minutes—the center should still look slightly underdone when you remove them from the oven. They'll continue to set as they cool. When melting the chocolate and butter, stir frequently to prevent scorching, and allow the mixture to cool briefly before adding to the eggs to avoid scrambling them. For the cleanest slices, refrigerate the cooled brownies for 30 minutes before cutting, and wipe your knife clean between cuts.

Varianten und Anpassungen

For a nut-free version, omit peanut butter or replace with sunflower seed butter. Add chocolate chips or chopped nuts for extra texture throughout the brownies. You can also experiment with different nut butters like almond or cashew for varied flavor profiles. If you prefer a less sweet swirl, skip the powdered sugar in the peanut butter mixture. For an extra indulgent version, press additional chocolate chips into the top before baking.

Serviervorschläge

Serve with a scoop of vanilla ice cream for an indulgent dessert that contrasts beautifully with the warm, fudgy brownies. These brownies are also delicious at room temperature with a glass of cold milk or a cup of coffee. For a party presentation, dust with powdered sugar or drizzle with melted chocolate. They store well in an airtight container for up to 5 days at room temperature, or can be frozen for up to 3 months.

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These sourdough discard brownies prove that sustainable baking doesn't mean compromising on flavor or texture. With their rich chocolate base, tangy complexity from the starter, and that show-stopping peanut butter swirl, they're destined to become your go-to recipe whenever you have discard to use up. Bake a batch today and discover how deliciously practical sourdough baking can be.

Recipe Questions & Answers

→ What role does sourdough discard play in the brownies?

Sourdough discard adds moisture and a subtle tang that enhances the chocolate's richness, making the brownies fudgier and more tender.

→ Can I substitute peanut butter in the swirl?

Yes, you can replace peanut butter with sunflower seed butter or omit it altogether for a nut-free version while maintaining the swirl effect.

→ How do I know when the brownies are done baking?

The brownies are ready when the center is just set and a toothpick inserted comes out with moist crumbs but no raw batter.

→ Can I add mix-ins like nuts or chocolate chips?

Absolutely! Adding chopped nuts or extra chocolate chips to the batter can provide additional texture and flavor.

→ What is the best way to achieve the peanut butter swirl?

Drop spoonfuls of peanut butter mixture over the batter and use a skewer or knife to gently swirl it through for a marbled effect.