Crispy Edge Sourdough Brownies

Name: Crispy Edge Sourdough Brownies
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 16 brownies
Ingredients: 1 cup (200g) granulated sugar; 1/2 cup (100g) packed brown sugar; 1/2 cup (115g) unsalted butter, melted; 1/2 cup (120g) sourdough starter, active; 2 large eggs; 1 cup (120g) all-purpose flour; 1/2 cup (50g) cocoa powder; 1/4 teaspoon salt; 1 cup (175g) chocolate chips

Highlighted under: Modern Kitchen

I absolutely love finding ways to get creative with my baking, and these Crispy Edge Sourdough Brownies are a delightful outcome of that experimentation! Combining the rich, fudgy flavor of traditional brownies with the tangy depth of sourdough, they satisfy my sweet cravings like no other. The crispy edges are my favorite part, adding just the right amount of texture. I can’t wait for you to try them; I promise they won’t last long!

Created by

Rhiannon Sutherland

Last updated on 2026-01-24T12:13:34.998Z

When I first started baking brownies, I was on a quest to achieve that perfect crispy edge – you know, the kind that contrasts beautifully with the chewy center. After numerous attempts, I realized that including a bit of sourdough starter not only enhances flavor but also contributes to that elusive texture. This innovative method truly elevates the classic brownie experience!

I recommend using a well-fed starter for optimal results. The subtle tang it introduces complements the chocolate beautifully. Each bite is a delicious balance of flavors, and while I enjoy them at any time, they're especially perfect for sharing at gatherings with family and friends!

        Why You'll Love These Brownies
        Intense chocolate flavor balanced with sourdough's tanginess
Perfectly crispy edges that contrast with the fudgy center
An exciting twist on classic brownies for adventurous bakers

      

The Importance of Sourdough in Brownies

Incorporating sourdough starter into brownie batter does more than just add a unique flavor; it introduces natural fermentation that enriches the chocolate experience. The slight tanginess from the sourdough balances the sweetness of the sugars, creating a beautifully complex flavor profile. Using active sourdough starter is essential to ensure proper leavening and texture. Be sure to feed your starter a few hours before baking, so it’s bubbly and ready to work its magic in this recipe.

Moreover, the moisture from the sourdough enhances the fudgy texture of the brownies. Instead of relying solely on butter and eggs for richness, the starter contributes additional hydration, resulting in a softer, more decadent center. If you prefer a more pronounced sour flavor, consider using a slightly older sourdough starter, as it may introduce more tang to the final product.

Achieving the Perfect Texture

One of the standout features of these brownies is their crispy edges paired with a fudgy center. To achieve this, it’s crucial to properly monitor baking time. Set your timer for 30 minutes, but check for doneness a few minutes early. The brownies should be set at the edges while still slightly soft in the middle when you gently shake the pan. If you overbake, you risk losing that chewy center and achieving a cakier texture instead of the desired brownie experience.

Cooling is also key. Allowing the brownies to rest in the pan for about 10 minutes before transferring them to a wire rack prevents them from becoming too dense or moist. The steam trapped in the pan during cooling helps to keep the edges crispy, while the center remains indulgently soft. I recommend cutting them into squares only after they have completely cooled to ensure clean edges and a perfect presentation when serving.

Ingredients

Gather these ingredients to make the best brownies!

Brownie Ingredients

1 cup (200g) granulated sugar
1/2 cup (100g) packed brown sugar
1/2 cup (115g) unsalted butter, melted
1/2 cup (120g) sourdough starter, active
2 large eggs
1 cup (120g) all-purpose flour
1/2 cup (50g) cocoa powder
1/4 teaspoon salt
1 cup (175g) chocolate chips

Make sure you measure everything accurately for the best results!

Instructions

Here's how to make these delicious brownies step by step:

Preheat the Oven

Preheat your oven to 350°F (175°C) and line a 9x9-inch baking pan with parchment paper, leaving some overhang for easy removal.

Mix Sugars and Butter

In a large mixing bowl, combine granulated sugar, brown sugar, and melted butter. Stir well until the mixture is smooth and glossy.

Add Sourdough and Eggs

Mix in the sourdough starter and eggs until fully incorporated. The mixture should be slightly thick.

Combine Dry Ingredients

In a separate bowl, whisk together the flour, cocoa powder, and salt. Gradually fold the dry ingredients into the wet mixture until just combined.

Add Chocolate Chips

Gently fold in the chocolate chips, ensuring an even distribution throughout the batter.

Bake

Pour the batter into the prepared baking pan, spreading it evenly. Bake in the preheated oven for 30 minutes or until a toothpick inserted in the center comes out with a few moist crumbs.

Cool and Slice

Allow the brownies to cool in the pan for about 10 minutes before using the parchment overhang to lift them out. Let them cool completely on a wire rack before slicing into squares.

Enjoy your delicious Crispy Edge Sourdough Brownies with a scoop of ice cream or a drizzle of chocolate sauce!

Pro Tips

For the best texture, let the brownies cool completely before cutting them. This helps them set and enhances the crispy edges!

Storage and Make-Ahead Tips

These Crispy Edge Sourdough Brownies can be made ahead of time, making them a great treat for gatherings or a week-long indulgence. Once cooled, wrap the brownies tightly in plastic wrap or store them in an airtight container at room temperature for up to five days. For longer storage, consider freezing them. Cut the brownies into squares, place them in a single layer on a baking sheet to harden, then transfer to a freezer-safe container. They can last up to three months in the freezer.

When you're ready to enjoy a brownie, there’s no need to thaw them beforehand. Simply take them out and let them sit at room temperature for a few minutes, or pop them in the microwave for about 10-15 seconds for a warmed treat that enhances their fudgy texture and rich chocolate flavor.

Variations and Serving Suggestions

Feel free to customize these brownies with your favorite mix-ins. Consider adding nuts for a crunchy contrast, or swirl in some peanut butter or caramel before baking for an extra layer of flavor. Dried fruits, like cherries or cranberries, can also enhance both the texture and taste, creating a delightful fusion with the chocolate.

When it comes to serving, consider pairing the brownies with a scoop of vanilla ice cream or a dollop of whipped cream to elevate the dessert experience. A sprinkle of sea salt on top just before serving can enhance the chocolate's depth and provide a delightful contrast to the sweetness. They're perfect for dessert platters or as a special standalone treat!

Questions About Recipes

→ Can I use a different type of flour?

Yes, you can substitute the all-purpose flour with a gluten-free blend, but the texture may vary.

→ What can I use instead of sourdough starter?

If you don’t have sourdough, you can use plain yogurt or buttermilk for a similar tangy flavor.

→ How do I store leftover brownies?

Store them in an airtight container at room temperature for up to 3 days, or refrigerate for longer freshness.

→ Can I freeze these brownies?

Absolutely! Wrap the cooled brownies tightly in plastic wrap and freeze for up to 3 months. Thaw in the refrigerator or at room temperature.