Crispy Edge Sourdough Brownies

Highlighted under: Oven Cooking

I love experimenting with sourdough, and these Crispy Edge Sourdough Brownies are my latest obsession. The tangy flavor of sourdough perfectly complements the rich chocolate, creating a delightful contrast in every bite. The crispy edges are a game-changer, offering that satisfying crunch I crave. Plus, incorporating sourdough gives these brownies a unique twist that has impressed my family and friends. Trust me, once you try these brownies, you'll be searching for excuses to make them again and again!

Nerissa Caldwell

Created by

Nerissa Caldwell

Last updated on 2026-01-24T14:29:34.855Z

When I first decided to make brownies with sourdough, I wasn't sure how it would turn out. But after a few trials, I perfected the recipe to highlight the deliciously tangy notes from the sourdough starter. The key is to balance the sweetness of the chocolate with the acidity of the sourdough to produce a harmonious flavor profile!

What I love most about these brownies is the texture. The combination of crispy edges and a fudgy center makes each bite heavenly. When baking, make sure to spread the batter evenly to ensure those edges get that perfect crunch while keeping the center delectably soft.

Why You'll Love This Recipe

  • Rich chocolate flavor paired with tangy sourdough notes
  • Crispy edges that contrast perfectly with a gooey middle
  • Simple ingredients that create an impressive treat

Understanding Sourdough's Unique Role

In these brownies, the sourdough starter isn't just an ingredient; it's a transformative agent. The acidity in the starter enhances the flavors of the chocolate, resulting in a depth that regular brownies often lack. It's important to use an unfed sourdough starter, as it provides the right balance of tanginess and yeast that contributes to the texture without being overtly sour.

Furthermore, the fermentation process from the sourdough aids in achieving a chewier brownie. This chewy texture complements the crispy edges beautifully, making every bite a delightful experience. If you're unsure whether your starter is active, a simple float test can help determine its viability. Just drop a teaspoon of the starter in a glass of water; if it floats, it's ready to go!

Mastering the Baking Technique

Achieving those coveted crispy edges requires attention to your baking technique. Start by evenly spreading the brownie batter in the pan; this ensures uniform cooking. Once placed in the preheated oven, resist the urge to open the door too often. Each time you do, the temperature drops, which can lead to uneven baking and may cause the edges to not crisp up properly.

Keep a close eye on the brownies during the last few minutes of baking. You’ll want to pull them out when a toothpick inserted comes out with moist crumbs, not wet batter. Overbaking will result in a drier texture, while underbaking could leave you with a gooey center that may fall apart. The aim is to strike the perfect balance for a chewy interior and crunchy exterior.

Storing and Serving Suggestions

For those who want to make these brownies ahead of time, they can be stored in an airtight container. If kept properly, they stay fresh for up to a week. To maintain the crispy edges, avoid stacking them directly on top of each other or covering them too tightly, as this can lead to moisture buildup. You can also freeze extra brownies; just wrap them individually in plastic wrap and store them in a freezer-safe bag for up to three months.

When it's time to serve, consider pairing these brownies with a scoop of vanilla ice cream or a drizzle of salted caramel for an elevated dessert experience. For an extra touch, sprinkle a pinch of sea salt on top before serving to enhance the chocolate flavor. If you're feeling adventurous, incorporating nuts or chocolate chips into the batter can add another layer of texture and flavor.

Ingredients

Brownie Ingredients

  • 1 cup (226g) unsalted butter, melted
  • 2 cups (400g) granulated sugar
  • 1 cup (200g) packed brown sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup (120g) all-purpose flour
  • 1 cup (90g) unsweetened cocoa powder
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1/2 cup (120g) sourdough starter, unfed

Instructions

Preheat the oven

Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan or line with parchment paper.

Mix wet ingredients

In a large bowl, combine the melted butter, granulated sugar, and brown sugar. Whisk until smooth. Add the eggs and vanilla extract, mixing well.

Combine dry ingredients

In a separate bowl, sift together the flour, cocoa powder, baking powder, and salt.

Add to wet ingredients

Gradually add the dry mixture to the wet ingredients and fold in gently. Finally, incorporate the sourdough starter until well combined.

Bake the brownies

Pour the batter into the prepared pan, spreading it evenly. Bake for 25 minutes or until a toothpick comes out with moist crumbs.

Cool and serve

Allow the brownies to cool in the pan before slicing into squares. Enjoy your delicious crispy edge brownies!

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Pro Tips

  • For extra chocolatey brownies, consider adding chocolate chips or nuts into the batter before baking! If you prefer a lighter texture, replace half of the butter with applesauce.

Ingredient Substitutions

If you are looking for ways to customize this brownie recipe, consider substituting the granulated sugar with coconut sugar for a lower glycemic index option that adds a slight caramel flavor. You can also use gluten-free flour in place of all-purpose flour, though the texture might vary slightly; aim for a blend that contains xanthan gum for the best results.

For a dairy-free version, substitute the unsalted butter with coconut oil or a plant-based butter, ensuring it’s melted before incorporating it into the batter. This will maintain richness while accommodating dietary preferences. Additionally, you could explore using a vegan egg replacer, like flax eggs, to replace the eggs if you need a vegan option.

Troubleshooting Common Issues

If your brownies come out too dry, it might be because of overbaking or using too much flour. Make sure to measure your flour accurately—spoon it into the measuring cup instead of scooping directly from the bag, which can compact it. For extra moisture, consider adding a couple of tablespoons of brewed coffee or milk to the batter, which enhances flavor and moisture without altering the sourdough base.

On the other hand, if your brownies fall apart when cutting, they may have been underbaked or not cooled properly. Allow the brownies to cool in the pan for at least 20 minutes before slicing. Investing in a sharp knife also helps create clean cuts for a beautiful presentation.

Questions About Recipes

→ Can I use fed sourdough starter?

Yes, but unfed sourdough will provide a better flavor and consistency.

→ What can I substitute for butter?

You can use coconut oil or a vegan butter alternative in equal amounts.

→ How do I store leftovers?

Store them in an airtight container at room temperature for up to 3 days or in the fridge for about a week.

→ Can I freeze these brownies?

Absolutely! Wrap them tightly and freeze for up to 3 months. Thaw at room temperature before enjoying.

Crispy Edge Sourdough Brownies

I love experimenting with sourdough, and these Crispy Edge Sourdough Brownies are my latest obsession. The tangy flavor of sourdough perfectly complements the rich chocolate, creating a delightful contrast in every bite. The crispy edges are a game-changer, offering that satisfying crunch I crave. Plus, incorporating sourdough gives these brownies a unique twist that has impressed my family and friends. Trust me, once you try these brownies, you'll be searching for excuses to make them again and again!

Prep Time20 minutes
Cooking Duration25 minutes
Overall Time45 minutes

Created by: Nerissa Caldwell

Recipe Type: Oven Cooking

Skill Level: Beginner

Final Quantity: 12 servings

What You'll Need

Brownie Ingredients

  1. 1 cup (226g) unsalted butter, melted
  2. 2 cups (400g) granulated sugar
  3. 1 cup (200g) packed brown sugar
  4. 4 large eggs
  5. 1 teaspoon vanilla extract
  6. 1 cup (120g) all-purpose flour
  7. 1 cup (90g) unsweetened cocoa powder
  8. 1 teaspoon baking powder
  9. 1/2 teaspoon salt
  10. 1/2 cup (120g) sourdough starter, unfed

How-To Steps

Step 01

Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan or line with parchment paper.

Step 02

In a large bowl, combine the melted butter, granulated sugar, and brown sugar. Whisk until smooth. Add the eggs and vanilla extract, mixing well.

Step 03

In a separate bowl, sift together the flour, cocoa powder, baking powder, and salt.

Step 04

Gradually add the dry mixture to the wet ingredients and fold in gently. Finally, incorporate the sourdough starter until well combined.

Step 05

Pour the batter into the prepared pan, spreading it evenly. Bake for 25 minutes or until a toothpick comes out with moist crumbs.

Step 06

Allow the brownies to cool in the pan before slicing into squares. Enjoy your delicious crispy edge brownies!

Extra Tips

  1. For extra chocolatey brownies, consider adding chocolate chips or nuts into the batter before baking! If you prefer a lighter texture, replace half of the butter with applesauce.

Nutritional Breakdown (Per Serving)

  • Calories: 300 kcal
  • Total Fat: 20g
  • Saturated Fat: 12g
  • Cholesterol: 90mg
  • Sodium: 70mg
  • Total Carbohydrates: 30g
  • Dietary Fiber: 2g
  • Sugars: 24g
  • Protein: 4g