Brownies With Sourdough Starter

Highlighted under: Sweet Ideas

I’ve always loved brownies, but combining them with sourdough starter took my baking to a new level. The tangy flavor from the sourdough enhances the chocolate richness, creating a unique taste experience. I started experimenting with my leftover starter and was amazed at how it transformed the texture, making these brownies ultra-moist and fudgy. Even those who aren’t fans of sourdough will be pleasantly surprised by the outcome. Join me in making these delightful brownies that will impress everyone at your next gathering!

Marigold Pearson

Created by

Marigold Pearson

Last updated on 2026-01-24T11:03:35.110Z

When I first thought of using sourdough in my brownies, I wasn’t sure how well it would blend with the chocolate. After several tests, I discovered that the sourdough adds both a depth of flavor and a wonderful moistness that keeps the brownies chewy. It’s a perfect use for that extra starter I often have after baking bread!

One tip I learned along the way is to slightly reduce the sugar when using sourdough, as it can bring out more sweetness in the chocolate. Trust me, these brownies will be the highlight of any dessert table!

Why You'll Love These Brownies

  • Rich chocolate flavor balanced with a hint of sourness
  • Ultra-moist and fudgy texture that is undeniably satisfying
  • A creative and delicious way to use up sourdough starter

Understanding the Ingredients

Each ingredient in these brownies plays a crucial role in achieving that perfect balance of flavor and texture. The unsalted butter not only provides richness but also contributes to the brownies' fudgy consistency. Using unsalted butter allows you to control the saltiness, which is especially important when incorporating other ingredients like chocolate and sourdough starter.

The sourdough starter is a game changer in this recipe. It adds a unique tang that complements the deep chocolate flavor, creating a well-rounded taste. Additionally, the natural acidity of the sourdough reacts with the baking powder, promoting a tender crumb. This is why using a discard starter is not just acceptable—it enhances the overall outcome.

Baking Tips for Perfect Brownies

When measuring your flour and cocoa powder, be sure to spoon them into the measuring cup and level them off with a knife for accuracy. Too much flour can result in dry brownies, while an insufficient amount can cause them to collapse. Remember, the goal is to achieve a smooth, glossy batter that pours easily but holds together well.

Baking time can vary slightly based on your oven and the type of baking pan you use. If you’re using a glass dish, keep in mind that it might take a couple of extra minutes to bake. A toothpick inserted in the center should come out with moist crumbs, indicating they're ready. Under-baking slightly keeps them richer and fudgier.

Ingredients

Gather the following ingredients to create these delicious brownies:

Brownie Ingredients

  • 1 cup unsalted butter
  • 2 cups granulated sugar
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1 cup cocoa powder
  • 1/2 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 cup sourdough starter (discard is fine)
  • 1 cup chocolate chips

Make sure to measure your ingredients accurately for the best results!

Instructions

Follow these steps for perfectly baked brownies:

Melt the Butter

In a medium saucepan, melt the unsalted butter over low heat. Once melted, remove from the heat and stir in sugar until well combined.

Mix in Eggs and Vanilla

Allow the butter-sugar mixture to cool slightly, then add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

Combine Dry Ingredients

In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt. Gradually add the dry mixture to the butter mixture and mix until just combined.

Add Sourdough Starter

Fold in the sourdough starter until fully incorporated, then mix in the chocolate chips.

Bake

Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan and pour in the brownie batter. Bake for 25 minutes, or until a toothpick inserted in the center comes out with moist crumbs.

Cool and Serve

Let the brownies cool in the pan for at least 10 minutes before slicing them. Enjoy your decadent brownies warm or at room temperature!

Feel free to experiment with toppings or add-ins like nuts or caramel for extra flavor!

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Pro Tips

  • For an extra chocolate kick, swirl in some peanut butter or Nutella before baking.

Storage and Make-Ahead Options

These brownies can be made ahead of time, making them perfect for gatherings or meal prep. Once baked, allow them to cool completely in the pan, then cut them into squares. Store the brownies in an airtight container at room temperature for up to four days. For longer storage, you can freeze them for up to three months—just make sure to wrap them tightly in plastic wrap and then in aluminum foil to prevent freezer burn.

If you prefer to make the batter ahead of baking, you can refrigerate it for a day. Just remember to let it come to room temperature before pouring it into the baking dish and placing it in the oven. This method is great if you're preparing for a party and want to have warm brownies ready to serve on short notice.

Variations and Customizations

Feel free to customize these brownies with your favorite mix-ins! Adding nuts, such as walnuts or pecans, enhances the texture and adds a delightful crunch. If you want to elevate the flavor, consider incorporating a swirl of peanut butter or caramel into the batter before baking. This step creates beautiful marbling and offers a new layer of taste with each bite.

For a twist on the classic brownie, try substituting some of the all-purpose flour with whole wheat flour. This change not only adds a nutty flavor but also boosts the nutritional profile. Adjustments like this can subtly alter the texture, so start by swapping out 1/4 to 1/2 cup of flour to see how it affects the final product.

Questions About Recipes

→ Can I use active sourdough starter?

Yes, using an active starter will work as well, but ensure it’s not too runny.

→ How can I store the leftover brownies?

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

→ Can I freeze these brownies?

Absolutely! Wrap them individually and freeze for up to 3 months. Thaw as needed.

→ What can I substitute for butter?

You can substitute with coconut oil or a dairy-free alternative if needed, just ensure it’s melted.

Brownies With Sourdough Starter

I’ve always loved brownies, but combining them with sourdough starter took my baking to a new level. The tangy flavor from the sourdough enhances the chocolate richness, creating a unique taste experience. I started experimenting with my leftover starter and was amazed at how it transformed the texture, making these brownies ultra-moist and fudgy. Even those who aren’t fans of sourdough will be pleasantly surprised by the outcome. Join me in making these delightful brownies that will impress everyone at your next gathering!

Prep Time15 minutes
Cooking Duration25 minutes
Overall Time40 minutes

Created by: Marigold Pearson

Recipe Type: Sweet Ideas

Skill Level: Intermediate

Final Quantity: 12 servings

What You'll Need

Brownie Ingredients

  1. 1 cup unsalted butter
  2. 2 cups granulated sugar
  3. 4 large eggs
  4. 1 teaspoon vanilla extract
  5. 1 cup all-purpose flour
  6. 1 cup cocoa powder
  7. 1/2 teaspoon baking powder
  8. 1/2 teaspoon salt
  9. 1 cup sourdough starter (discard is fine)
  10. 1 cup chocolate chips

How-To Steps

Step 01

In a medium saucepan, melt the unsalted butter over low heat. Once melted, remove from the heat and stir in sugar until well combined.

Step 02

Allow the butter-sugar mixture to cool slightly, then add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

Step 03

In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt. Gradually add the dry mixture to the butter mixture and mix until just combined.

Step 04

Fold in the sourdough starter until fully incorporated, then mix in the chocolate chips.

Step 05

Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan and pour in the brownie batter. Bake for 25 minutes, or until a toothpick inserted in the center comes out with moist crumbs.

Step 06

Let the brownies cool in the pan for at least 10 minutes before slicing them. Enjoy your decadent brownies warm or at room temperature!

Extra Tips

  1. For an extra chocolate kick, swirl in some peanut butter or Nutella before baking.

Nutritional Breakdown (Per Serving)

  • Calories: 380 kcal
  • Total Fat: 26g
  • Saturated Fat: 15g
  • Cholesterol: 195mg
  • Sodium: 85mg
  • Total Carbohydrates: 32g
  • Dietary Fiber: 3g
  • Sugars: 24g
  • Protein: 6g