Can I use active sourdough starter instead of discard?

Yes, active sourdough starter can be used in Sourdough Peanut Butter Brownies. Both discard and active starter work well because the recipe does not rely on fermentation for rising. Using fresh discard will result in a milder sourdough flavor, while older discard may add a slightly more noticeable tang?

Why did my Sourdough Peanut Butter Brownies turn out dry?

Dry brownies are usually the result of overbaking. For perfectly fudgy Sourdough Peanut Butter Brownies, remove them from the oven when the edges are set but the center is still slightly soft. A toothpick inserted into the middle should come out with moist crumbs rather than completely clean. Another factor can be too much flour. Measuring flour accurately or using a kitchen scale helps maintain the ideal brownie texture.

Can I add nuts or extra chocolate to Sourdough Peanut Butter Brownies?

Absolutely. Sourdough Peanut Butter Brownies are very adaptable. You can mix chopped walnuts, pecans, or peanuts into the batter for added crunch. Chocolate chips or chunks can also be added to intensify the chocolate flavor and create pockets of melted chocolate throughout the brownies.

Sourdough Peanut Butter Brownies – Easy Fudgy Recipe

Name: Sourdough Peanut Butter Brownies
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 113 g unsalted butter, melted (1/2 cup); 140 g brown sugar, packed (2/3 cup); 140 g granulated sugar (2/3 cup); 85 g dark chocolate, chopped and melted (3 oz); 2 large eggs (about 100 g); 100 g sourdough discard (about 1/2 cup); 1 teaspoon vanilla extract (5 ml); 55 g cocoa powder, preferably Dutch-processed (2/3 cup); 30 g all-purpose flour (scant 1/4 cup); 1 teaspoon salt (6 g); 85 g creamy peanut butter (about 1/3 cup)

Description

Sourdough Peanut Butter Brownies are rich, fudgy chocolate brownies swirled with creamy peanut butter and made with sourdough discard. This easy one-bowl dessert delivers deep chocolate flavor, a chewy texture, and a subtle tang that enhances the sweetness. Perfect for using leftover sourdough starter, these brownies bake into thick, indulgent squares ideal for snacks, lunchboxes, or a comforting homemade treat.

Ingredients

Scale

113 g unsalted butter, melted (1/2 cup)
140 g brown sugar, packed (2/3 cup)
140 g granulated sugar (2/3 cup)
85 g dark chocolate, chopped and melted (3 oz)
2 large eggs (about 100 g)
100 g sourdough discard (about 1/2 cup)
1 teaspoon vanilla extract (5 ml)
55 g cocoa powder, preferably Dutch-processed (2/3 cup)
30 g all-purpose flour (scant 1/4 cup)
1 teaspoon salt (6 g)
85 g creamy peanut butter (about 1/3 cup)

Cook Mode Prevent your screen from going dark

Instructions

Preheat the oven to 350°F (175°C) and line an 8×8 inch (20×20 cm) baking pan with parchment paper.
In a large mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth and glossy.
Melt the chopped dark chocolate in a microwave-safe bowl in 20–30 second intervals, stirring until smooth. Add the melted chocolate to the sugar mixture and whisk until combined.
Add the eggs one at a time, whisking well after each addition until the batter becomes smooth and slightly fluffy.
Stir in the sourdough discard and vanilla extract until fully incorporated.
Add the cocoa powder, all-purpose flour, and salt. Fold gently with a spatula until a thick and smooth brownie batter forms.
Spread the batter evenly into the prepared baking pan.
Spoon small dollops of creamy peanut butter across the surface of the batter.
Use a knife to gently swirl the peanut butter through the batter to create a marbled pattern.
Bake for 35–40 minutes until the edges are set and a toothpick inserted in the center comes out with moist crumbs.
Allow the brownies to cool completely in the pan before slicing into squares and serving.

Notes

Use sourdough discard that is only a few days old for a milder sourdough flavor.
Dutch-processed cocoa powder enhances the chocolate flavor and creates darker brownies.
Do not overbake; brownies should still be slightly soft in the center for a fudgy texture.
Natural peanut butter may separate during baking, so creamy no-stir peanut butter works best.
For extra indulgence, add 1/2 cup (85 g) chocolate chips or chopped nuts to the batter.
Store brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to 1 week.

Prep Time: 10 minutes
Cook Time: 35 minutes
Category: Dessert
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 brownie
Calories: 211 kcal
Sugar: 19 g
Sodium: 182 mg
Fat: 12 g
Saturated Fat: 6 g
Unsaturated Fat: 5 g
Trans Fat: 0.2 g
Carbohydrates: 26 g
Fiber: 2 g
Protein: 3 g
Cholesterol: 39 mg