If you love brownies and want something special, you need to try crackly top sourdough brownies. They deliver a delightful blend of rich chocolate and tangy sourdough flavor. In this post, I’ll guide you through every step, from ingredients to baking tips, ensuring you achieve that perfect crackly top. Ready to impress your friends and family? Let’s dive into this irresistible delight!
Why I Love This Recipe
- Unique Flavor Profile: The combination of cocoa and sourdough adds a delightful tanginess that elevates traditional brownies to a new level.
- Perfect Texture: The crackly top and fudgy interior create a satisfying contrast that keeps you coming back for more.
- Easy to Make: With straightforward instructions and simple ingredients, these brownies are accessible to bakers of all skill levels.
- Guilt-Free Indulgence: Using sourdough starter gives these brownies a unique twist, making them feel just a bit healthier without sacrificing flavor.
Ingredients
List of Ingredients
- 1 cup unsweetened cocoa powder
- 1 cup all-purpose flour
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- 1 cup granulated sugar
- 1/2 cup packed brown sugar
- 1/2 cup unsalted butter, melted
- 1 cup active and bubbly sourdough starter
- 3 large eggs
- 1 teaspoon vanilla extract
- 1 cup chocolate chips or chunks (dark or semi-sweet)
Measurement Guide
- Cocoa powder: Use a dry measuring cup. Scoop and level off for accuracy.
- All-purpose flour: Spoon flour into the cup and level it off with a knife.
- Baking powder: Use a measuring spoon. Level it off for the right amount.
- Salt: Use a measuring spoon and level off just like the baking powder.
- Granulated sugar and brown sugar: Measure with a dry cup. Pack the brown sugar lightly.
- Unsalted butter: Melt and measure in a liquid measuring cup.
- Sourdough starter: Use a liquid measuring cup for accuracy.
- Eggs: Large eggs are standard; use size as noted.
- Vanilla extract: Use a measuring spoon.
- Chocolate chips: Use a dry measuring cup. Fill to the top and level off.
Ingredient Substitutions
- Cocoa powder: Use carob powder for a different taste.
- All-purpose flour: Swap with whole wheat flour for a heartier texture.
- Baking powder: Use baking soda, but add an acid like vinegar.
- Granulated sugar: Coconut sugar can replace granulated sugar.
- Brown sugar: Use regular sugar with a little molasses for a similar flavor.
- Unsalted butter: Coconut oil works well as a substitute.
- Sourdough starter: You can use plain yogurt if needed.
- Eggs: Use flaxseed meal mixed with water as a vegan option.
- Vanilla extract: Almond extract can give a nice twist.
- Chocolate chips: Substitute with chopped nuts for a crunchy texture.
These ingredients all work together to create the perfect balance of rich chocolate flavor and that unique crackly top. Each substitution can change the taste slightly, allowing you to personalize your brownies!

Step-by-Step Instructions
Preparation of the Baking Pan
Start by preheating your oven to 350°F (175°C). Grab a 9x13-inch baking pan. Lightly grease it with butter or oil. Next, line the bottom with parchment paper. Leave some paper hanging over the edges. This helps with easy removal later.
Mixing Dry Ingredients
In a medium bowl, add 1 cup of unsweetened cocoa powder, 1 cup of all-purpose flour, 1/2 teaspoon of baking powder, and 1/4 teaspoon of salt. Whisk these together until they are well mixed. This step ensures the leavening agent and salt spread evenly in your batter.
Combining Wet Ingredients
Take a large mixing bowl. Combine 1 cup of granulated sugar and 1/2 cup of packed brown sugar. Pour in 1/2 cup of melted unsalted butter. Stir until you see a smooth mix with no lumps. This creates a rich base for your brownies.
Now, add 1 cup of active sourdough starter, 3 large eggs, and 1 teaspoon of vanilla extract. Whisk everything until it looks glossy and combined.
Mixing Batter
Gradually mix in the dry ingredients. Gently stir until just combined. You want to see no flour streaks but don’t overmix. Overmixing can make your brownies tough.
Now, fold in 1 cup of chocolate chips or chunks. Make sure they spread evenly in the batter. This gives you tasty chocolate bites in every bite.
Baking Process and Tips
Pour the brownie batter into the prepared pan. Use a spatula to spread it evenly. Place the pan in your preheated oven. Bake for 25-30 minutes. To check if they are done, insert a toothpick into the center. It should come out with a few moist crumbs.
Cooling and Serving
Once baked, take the brownies out of the oven. Let them cool in the pan for about 15 minutes. After that, lift them out using the parchment paper and place them on a wire rack. Let them cool completely.
When cooled, cut into squares. Enjoy the crackly top and rich fudgy inside! Serve them on a rustic board, maybe dusted with cocoa or powdered sugar. For extra delight, pair them with a scoop of vanilla ice cream.
Tips & Tricks
Achieving the Perfect Crackly Top
To get that shiny, crackly top, beat the eggs well. Whisk them until they are light and frothy. This adds air, creating the perfect surface. Also, add your sugars to the melted butter and mix until smooth. This helps create a great base for the perfect texture. Avoid overmixing once you add the dry ingredients. Stir just until combined to keep the batter airy.
Common Mistakes to Avoid
One common mistake is not mixing the eggs enough. Ensure they are well-beaten for a nice rise. Another issue is using cold ingredients. Always make sure your butter and sourdough starter are at room temperature. This helps the batter mix better. Overbaking can also ruin the brownies. Watch them closely and use a toothpick to check doneness.
Enhancing Flavor and Texture
To boost flavor, try adding a pinch of espresso powder to the dry mix. This can deepen the chocolate taste. You can also swap some all-purpose flour for whole wheat flour for a nutty flavor. For added texture, mix in nuts or use a mix of chocolate chips. Dark chocolate chunks can give extra richness, making each bite more delightful.
Pro Tips
- Use Fresh Sourdough Starter: Make sure your sourdough starter is active and bubbly for the best rise and flavor in your brownies.
- Don’t Overmix: When combining your wet and dry ingredients, mix just until incorporated to maintain a fudgy texture.
- Check for Doneness: Insert a toothpick into the center; if it comes out with a few moist crumbs, your brownies are perfectly baked.
- Cool Completely: Allow the brownies to cool fully before cutting for clean edges and a better texture.
Variations
Gluten-Free Options
You can make these brownies gluten-free. Use a gluten-free flour blend instead of all-purpose flour. Look for a mix that has xanthan gum. This will give your brownies the right texture. Measure the flour carefully. You need the same amount as the recipe calls for. The result will be rich and fudgy, just like the original.
Flavor Add-Ins
Add extra flavors to make your brownies unique. Try mixing in nuts like walnuts or pecans for crunch. You can also add dried fruits like cherries or raspberries. For a minty twist, use peppermint extract instead of vanilla. If you love spice, a pinch of cinnamon will surprise your taste buds. Get creative and find your favorite combination!
Dietary Modifications (Vegan, Lower Sugar)
To make vegan brownies, replace the eggs with flax eggs. Mix one tablespoon of ground flaxseed with three tablespoons of water. Let it sit for five minutes until it thickens. Use coconut oil instead of butter for richness. For lower sugar, use a sugar substitute like stevia or monk fruit. Adjust the amount to your taste. These changes keep the brownies tasty while fitting your diet.
Storage Info
Best Storage Practices
To keep your Crackly Top Sourdough Brownies fresh, store them properly. First, allow the brownies to cool completely. This step is key to keeping that crackly top intact. Once cool, place them in an airtight container. This helps avoid drying out. You can store them at room temperature for up to four days. For longer storage, keep them in the fridge for about a week.
How to Freeze Brownies
Freezing brownies is easy and fun! First, cut the brownies into squares. Wrap each square in plastic wrap. This protects the brownies from freezer burn. Place the wrapped squares in a freezer-safe bag. Squeeze out the air and seal it. You can freeze them for up to three months. When you want a treat, just take out a square and let it thaw at room temperature.
Reheating Instructions
To enjoy warm brownies, you can reheat them. Preheat your oven to 350°F (175°C). Place the brownies on a baking sheet. Heat them for about 10 minutes. This will bring back their fudgy goodness. You can also use a microwave. Just heat one square for about 15-20 seconds. Enjoy them warm with a scoop of ice cream for a special treat!
FAQs
What makes sourdough brownies different?
Sourdough brownies use active sourdough starter. This gives them a unique tangy flavor. The sourdough also helps create a moist texture. This makes them rich and fudgy. The crackly top comes from the sugars and the baking process. This gives a delightful contrast to the inside.
How can I tell when brownies are done baking?
Check the brownies at 25 minutes. Insert a toothpick into the center. If it comes out with a few moist crumbs, they are done. If it’s wet with batter, they need more time. Be careful not to overbake them, as they can dry out.
Can I use a different kind of sugar?
Yes, you can use different sugars. Coconut sugar or brown sugar works well. These can add a deeper flavor. Just keep the same amounts. If using liquid sweeteners, reduce the liquid in the recipe.
What should I do if my brownies are too dense?
If your brownies are too dense, try these tips. Make sure your baking powder is fresh. Overmixing can also cause density, so mix gently. You could add a bit more sourdough starter to lighten the batter.
How long do these brownies stay fresh?
These brownies stay fresh for about 3 to 4 days. Store them in an airtight container at room temperature. If you want them to last longer, freeze them. They can last for up to 3 months in the freezer.
This blog post covered all you need to know about making brownies. We explored ingredient lists, measurements, and substitutions. I showed you step-by-step instructions to mix and bake. You learned tips for a perfect crackly top and common mistakes to avoid.
Consider trying the variations for different diets or flavors. Storage tips will keep your brownies fresh. Now, you have the tools to bake brownies like a pro. Enjoy your baking journey!