Sourdough Discard Brownies with Peanut Butter

Highlighted under: Artisan Dessert Bakes

Indulge in these rich and fudgy brownies made with sourdough discard and creamy peanut butter, perfect for satisfying your sweet tooth while reducing waste!

Emily

Created by

Emily

Last updated on 2025-12-27T19:14:28.220Z

These Sourdough Discard Brownies with Peanut Butter are an incredible way to use up leftover sourdough starter. Not only do they reduce waste, but they also bring a unique tangy flavor to the classic brownie. The addition of peanut butter enhances the richness, making these brownies a delightful treat for any occasion.

Why You'll Love These Brownies

  • Rich chocolate flavor balanced with the nuttiness of peanut butter
  • Use of sourdough discard adds a unique tang and moisture
  • Quick to prepare and perfect for any chocolate lover

The Benefits of Using Sourdough Discard

Sourdough discard is often overlooked, but it offers a wonderful way to reduce waste in your baking routine. Instead of tossing out the excess starter, incorporating it into recipes like these brownies not only minimizes waste but also adds a unique flavor profile. The natural fermentation process of sourdough gives these brownies a delightful tang that enhances the overall taste.

In addition to flavor, sourdough discard contributes moisture to the brownies, ensuring they remain fudgy and rich. This means you can enjoy a dessert that not only satisfies your sweet cravings but also delivers a touch of complexity that traditional brownies lack. By using this ingredient, you're making a conscious choice to be resourceful in the kitchen.

Why Peanut Butter Makes Everything Better

Peanut butter is a beloved ingredient in many desserts, and for good reason! Its creamy texture and nutty flavor complement chocolate perfectly, creating an irresistible combination. When swirled into brownie batter, peanut butter not only adds richness but also enhances the overall taste experience, making each bite truly indulgent.

Moreover, peanut butter is a source of healthy fats and protein, which can make your treat feel a bit more wholesome. While these brownies are definitely a dessert, the addition of peanut butter provides a slight nutritional boost, making them feel less like a guilty pleasure and more like a satisfying snack.

Tips for Perfect Brownies

To achieve the ultimate fudgy texture in your brownies, be careful not to overmix the batter once the dry ingredients are added. Overmixing can lead to a tougher brownie, which you want to avoid at all costs. Instead, mix just until the flour is incorporated for the best results.

Another key tip is to let the brownies cool in the pan before cutting them into squares. This allows them to set properly, making them easier to slice and ensuring they hold their shape. For an extra touch, consider sprinkling some sea salt on top before baking for a delightful sweet and salty contrast!

Ingredients

Brownie Ingredients

  • 1 cup unsalted butter, melted
  • 2 cups granulated sugar
  • 1 cup sourdough discard
  • 4 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1 cup unsweetened cocoa powder
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1 cup creamy peanut butter

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

Instructions

Preheat the Oven

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

Mix Wet Ingredients

In a large bowl, combine the melted butter and sugar. Mix until well combined. Then add the sourdough discard, eggs, and vanilla extract. Stir until smooth.

Add Dry Ingredients

In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt. Gradually add this mixture to the wet ingredients, stirring until just combined.

Incorporate Peanut Butter

Pour half of the brownie batter into the prepared pan. Swirl in the peanut butter, then top with the remaining brownie batter.

Bake

Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

Cool and Serve

Allow the brownies to cool in the pan before cutting into squares and serving.

Enjoy your delicious brownies with a glass of milk or coffee!

Storage and Shelf Life

Once baked, these Sourdough Discard Brownies can be stored at room temperature in an airtight container for up to four days. If you want to keep them fresh for longer, refrigerate them for up to a week. Just be sure to allow them to come to room temperature before serving to enjoy their full flavor and soft texture.

For longer storage, consider freezing the brownies. Wrap individual squares tightly in plastic wrap and then place them in a freezer-safe bag. They can be frozen for up to three months. When you're ready to enjoy a piece, simply thaw it at room temperature or warm it slightly in the microwave for that fresh-baked taste.

Customization Ideas

While these brownies are delicious as is, feel free to customize them to suit your taste! Add chocolate chips, nuts, or even a swirl of caramel for an extra layer of flavor. You can experiment with different nut butters if you're looking for a change from peanut butter; almond or cashew butter can also work wonderfully.

If you're a fan of a little spice, consider adding a teaspoon of espresso powder or a pinch of cayenne pepper to the batter. These additions can enhance the chocolate flavor and give your brownies a unique twist that will impress your friends and family.

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Questions About Recipes

→ Can I use a different nut butter?

Yes, you can substitute almond butter or any nut butter of your choice.

→ How do I store leftover brownies?

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

→ Can I freeze these brownies?

Absolutely! Wrap them tightly in plastic wrap and freeze for up to 3 months.

→ What can I use instead of sourdough discard?

You can substitute with an equal amount of applesauce or yogurt, but the flavor will differ.

Sourdough Discard Brownies with Peanut Butter

Indulge in these rich and fudgy brownies made with sourdough discard and creamy peanut butter, perfect for satisfying your sweet tooth while reducing waste!

Prep Time15 minutes
Cooking Duration25 minutes
Overall Time40 minutes

Created by: Emily

Recipe Type: Artisan Dessert Bakes

Skill Level: Intermediate

Final Quantity: 12 brownies

What You'll Need

Brownie Ingredients

  1. 1 cup unsalted butter, melted
  2. 2 cups granulated sugar
  3. 1 cup sourdough discard
  4. 4 large eggs
  5. 1 teaspoon vanilla extract
  6. 1 cup all-purpose flour
  7. 1 cup unsweetened cocoa powder
  8. 1/2 teaspoon baking powder
  9. 1/4 teaspoon salt
  10. 1 cup creamy peanut butter

How-To Steps

Step 01

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

Step 02

In a large bowl, combine the melted butter and sugar. Mix until well combined. Then add the sourdough discard, eggs, and vanilla extract. Stir until smooth.

Step 03

In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt. Gradually add this mixture to the wet ingredients, stirring until just combined.

Step 04

Pour half of the brownie batter into the prepared pan. Swirl in the peanut butter, then top with the remaining brownie batter.

Step 05

Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

Step 06

Allow the brownies to cool in the pan before cutting into squares and serving.

Nutritional Breakdown (Per Serving)

  • Calories: 200 kcal
  • Total Fat: 12g
  • Saturated Fat: 5g
  • Cholesterol: 50mg
  • Sodium: 150mg
  • Total Carbohydrates: 22g
  • Dietary Fiber: 2g
  • Sugars: 15g
  • Protein: 4g