Sourdough Discard Brownies with Marshmallow

Highlighted under: Sweet Treats & Homemade Desserts

Delight in these fudgy brownies that utilize sourdough discard for a unique twist, topped with marshmallow for a gooey finish.

Lena

Created by

Lena

Last updated on 2025-12-27T20:31:27.774Z

These Sourdough Discard Brownies with Marshmallow are a delicious way to use leftover sourdough starter. The addition of marshmallow adds an irresistible sweetness and a chewy texture, making these brownies a perfect treat for any occasion.

Why You'll Love These Brownies

  • Rich chocolate flavor paired with fluffy marshmallow topping
  • Perfectly fudgy texture that satisfies chocolate cravings
  • A great way to reduce waste by using sourdough discard

A Unique Twist on Classic Brownies

Sourdough Discard Brownies with Marshmallow are not just a dessert; they are a delightful fusion of flavors and textures that will impress any chocolate lover. By incorporating sourdough discard into the brownie batter, you introduce a subtle tang that enhances the rich chocolate flavor. This innovative use of sourdough not only adds complexity to each bite but also makes these brownies a sustainable choice for bakers looking to minimize waste.

The addition of mini marshmallows on top creates a gooey, fluffy finish that contrasts beautifully with the dense brownie base. As the marshmallows melt slightly during baking, they form a sweet, light topping that adds an irresistible texture. This combination of fudgy brownies and pillowy marshmallows is sure to become a new favorite in your recipe repertoire, perfect for both casual snacking and special occasions.

The Joy of Baking with Sourdough Discard

Baking with sourdough discard opens up a world of possibilities. Instead of tossing out the excess starter from your sourdough baking, you can transform it into delicious treats like these brownies. This not only helps to reduce food waste but also contributes to a more sustainable kitchen. Each time you bake with sourdough discard, you’re making a positive impact on the environment while indulging in tasty desserts.

Moreover, sourdough discard is rich in flavor and nutrients, which means you’re adding depth to your baked goods. The tanginess of the discard balances out the sweetness of the brownies, creating a more complex taste experience. This method of utilizing sourdough discard allows for creativity in the kitchen, encouraging bakers to experiment with different recipes and flavors while being environmentally conscious.

Perfect for Every Occasion

These Sourdough Discard Brownies with Marshmallow are versatile enough to suit any occasion. Whether you're hosting a gathering, celebrating a birthday, or simply satisfying a chocolate craving, these brownies are sure to please. Their rich texture and delightful marshmallow topping make them a crowd-pleaser, and they can easily be cut into smaller squares for sharing.

Additionally, these brownies can be customized to suit your taste. Consider adding nuts for a crunchy contrast or drizzling melted chocolate over the top for an extra layer of indulgence. You can also experiment with different types of chocolate chips, such as dark or white chocolate, to create variations that will keep your baking exciting. No matter how you choose to make them, these brownies are bound to be a hit.

Ingredients

Gather these ingredients to make your brownies:

Brownie Ingredients

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

Marshmallow Topping

  • 2 cups mini marshmallows

Make sure you have everything ready before starting.

Instructions

Follow these steps to create your brownies:

Preheat the Oven

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

Melt the Butter

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

Mix Wet Ingredients

Add eggs, one at a time, mixing well after each addition. Stir in vanilla and sourdough discard until smooth.

Combine Dry Ingredients

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

Bake the Brownies

Pour the batter into the prepared pan and spread evenly. Bake for 25 minutes.

Add Marshmallows

Remove the brownies from the oven and sprinkle mini marshmallows on top. Return to the oven for an additional 5 minutes, or until marshmallows are puffy.

Cool and Serve

Allow the brownies to cool in the pan for at least 10 minutes before cutting into squares and serving.

Enjoy your delicious Sourdough Discard Brownies!

Storing Your Brownies

To keep your Sourdough Discard Brownies fresh, store them in an airtight container at room temperature for up to four days. If you want to extend their shelf life, you can refrigerate them, but be aware that refrigeration may alter the texture, making them a bit denser. For longer storage, consider freezing the brownies. Wrap them tightly in plastic wrap and place them in a freezer-safe container. They can be frozen for up to three months, allowing you to enjoy a sweet treat whenever the craving strikes.

When you're ready to enjoy your frozen brownies, simply remove them from the freezer and let them thaw at room temperature for a few hours. For an added touch, you can warm them in the microwave for a few seconds to bring back that fresh-baked softness. This makes them perfect for last-minute dessert cravings or unexpected guests.

Tips for Perfect Brownies

To ensure your brownies turn out perfectly fudgy, it's crucial not to overmix the batter once you combine the wet and dry ingredients. Mixing just until combined will preserve the dense texture. Also, keep an eye on the baking time; every oven is different, and even a few minutes can make a significant difference in the final product. Start checking for doneness around the 25-minute mark, and use a toothpick to test the center. If it comes out with a few moist crumbs, your brownies are ready.

For an extra special touch, consider adding a sprinkle of sea salt on top before baking. This will enhance the chocolate flavor and provide a delightful contrast to the sweetness of the marshmallows. Additionally, if you prefer a richer chocolate experience, you can substitute some of the granulated sugar for brown sugar, which adds moisture and depth to the flavor.

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Questions About Recipes

→ Can I use regular flour instead of all-purpose flour?

Yes, you can use cake flour or whole wheat flour for a different texture.

→ What can I substitute for the sourdough discard?

You can use applesauce or yogurt if you don’t have sourdough discard.

→ How should I store the brownies?

Store the brownies in an airtight container at room temperature for up to 3 days.

→ Can I freeze the brownies?

Yes, you can freeze them for up to 3 months. Just wrap them tightly in plastic wrap.

Sourdough Discard Brownies with Marshmallow

Delight in these fudgy brownies that utilize sourdough discard for a unique twist, topped with marshmallow for a gooey finish.

Prep Time20 minutes
Cooking Duration30 minutes
Overall Time50 minutes

Created by: Lena

Recipe Type: Sweet Treats & Homemade Desserts

Skill Level: Intermediate

Final Quantity: 16 brownies

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 sourdough discard
  6. 1 cup all-purpose flour
  7. 1 cup cocoa powder
  8. 1/2 teaspoon salt
  9. 1/2 teaspoon baking powder
  10. 1 cup chocolate chips

Marshmallow Topping

  1. 2 cups mini marshmallows

How-To Steps

Step 01

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

Step 02

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

Step 03

Add eggs, one at a time, mixing well after each addition. Stir in vanilla and sourdough discard until smooth.

Step 04

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

Step 05

Pour the batter into the prepared pan and spread evenly. Bake for 25 minutes.

Step 06

Remove the brownies from the oven and sprinkle mini marshmallows on top. Return to the oven for an additional 5 minutes, or until marshmallows are puffy.

Step 07

Allow the brownies to cool in the pan for at least 10 minutes before cutting into squares and serving.

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