If you’ve ever wondered how to turn your extra sourdough starter into a delectable treat, you’re in for a real delight with this Sourdough Blondies Recipe. These blondies are wonderfully chewy, boasting a rich buttery flavor with a subtle tang from the sourdough discard. Packed with semi-sweet chocolate chips, they strike the perfect balance between sweet and slightly tangy, creating a dessert experience that’s both familiar and intriguingly fresh. Once you taste them, these blondies might just become your new favorite way to use up that unused sourdough starter.

Ingredients You’ll Need

A white ceramic square baking dish lined with light brown parchment paper holds an uncooked chocolate chip batter spread evenly in one thick layer. The pale yellow batter is studded generously with dark chocolate chunks, creating a rough, textured surface with visible swirls and peaks. The dish is placed on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

This Sourdough Blondies Recipe keeps things simple, but every ingredient plays a key role in building its signature flavor and texture. From the mellow butter to the sharp tang of sourdough discard, each component helps create a blondie that’s richly satisfying and perfectly tender.

  • All Purpose Flour: The base that gives structure and body to your blondies.
  • Baking Powder: Ensures a slight lift so the blondies stay soft without being dense.
  • Butter, Softened: Adds richness and moisture for that luscious, chewy crumb.
  • Brown Sugar: Brings deep caramel notes and keeps the texture delightfully moist.
  • Egg: Acts as a binder and contributes to the blondies’ tender bite.
  • Vanilla Extract: Enhances all flavors with its warm, aromatic sweetness.
  • Sourdough Discard (Unfed, Inactive): Adds a subtle tang and helps keep the blondies wonderfully tender.
  • Semi-Sweet Chocolate Chips: The pockets of melty, chocolatey goodness that make every bite irresistible.

How to Make Sourdough Blondies Recipe

Step 1: Prepare Your Pan and Oven

Begin by preheating your oven to 350°F, the perfect temperature to achieve blondies that bake evenly with a luscious center. Line an 8×8 inch baking pan with parchment paper so that you can easily lift out the blondies when they’re cool, ensuring clean cuts and no sticking.

Step 2: Cream Butter and Brown Sugar

Take softened butter and brown sugar and mix them together by hand until the mixture turns pale and silky smooth. This step is crucial for creating that tender, chewy texture because it incorporates air and melts the sugars evenly.

Step 3: Add Egg and Vanilla

Next, stir in the egg and vanilla extract until the batter feels smooth and unified. These ingredients contribute moisture and depth, rounding out the flavor base and binding everything beautifully.

Step 4: Incorporate the Sourdough Discard

Gently fold in the sourdough discard. This ingredient brings a slight tang that contrasts beautifully with the sweet components, and it keeps the blondies moist in an unmatchable way. Make sure it’s fully mixed before moving to the dry ingredients.

Step 5: Mix Dry Ingredients

Whisk together the flour and baking powder in a separate bowl to prevent lumps. Then sprinkle this mixture over the wet ingredients and fold just until combined—the key to a tender, not overworked batter.

Step 6: Fold in Chocolate Chips

Stir in the semi-sweet chocolate chips, saving a handful to sprinkle over the top later. This ensures melty pockets of chocolate throughout, while the topping adds a lovely chocolatey finish.

Step 7: Bake to Perfection

Spread the batter evenly in your prepared pan and bake for 22 to 28 minutes. You want to achieve a set but slightly soft center—this is what makes each blondie perfectly chewy and satisfying. Keep an eye near the end to avoid overbaking.

Step 8: Cool and Slice

Allow the blondies to cool completely in their pan. Then, lift them out using the parchment paper, which makes slicing into neat squares a breeze. The cooling helps set the texture and intensifies the flavors.

How to Serve Sourdough Blondies Recipe

Three square pieces of cookie stacked on top of each other on a white plate, each piece showing a golden-brown baked dough with many dark chocolate chunks melted inside and on the surface. The top layer has visible, shiny melted chocolate chips that look soft and rich, while the dough looks crumbly yet moist. The background and surface are a white marbled texture, making the cookie's warm color stand out clearly. photo taken with an iphone --ar 4:5 --v 7

Garnishes

For a simple yet elegant touch, dust your warm sourdough blondies with a little powdered sugar or drizzle some melted white chocolate over the top. A sprinkle of flaky sea salt can also highlight the chocolate’s sweetness and the sourdough’s tang in an unexpected way.

Side Dishes

Serve these blondies alongside a scoop of vanilla ice cream or a dollop of whipped cream to add creamy contrast. Fresh berries work beautifully too, cutting through the richness and adding a pop of color and freshness.

Creative Ways to Present

Turn your sourdough blondies into decadent dessert bars by layering them with nuts or a swirl of cream cheese before baking. You can also sandwich two blondie squares with peanut butter or ganache for a fun twist that’s sure to wow friends and family.

Make Ahead and Storage

Storing Leftovers

Once cooled, store your sourdough blondies in an airtight container at room temperature. They will stay perfectly moist and tasty for up to four days—ideal for a quick treat or an impromptu dessert.

Freezing

If you want to keep them longer, these blondies freeze like a dream. Wrap them tightly in plastic wrap and foil before placing in the freezer. They keep well for up to three months without losing their wonderful texture.

Reheating

To enjoy your blondies warm after storage or freezing, simply microwave a single square for 15 to 20 seconds or reheat in the oven at a low temperature until just warmed through. This will bring back that fresh-baked softness and melt the chocolate chips delightfully.

FAQs

Can I use active sourdough starter instead of discard?

For this recipe, it’s best to use unfed, inactive sourdough discard because it has less yeast activity, which prevents the blondies from rising too much or developing a sour flavor. Active starter may alter the texture and taste.

What if I don’t have brown sugar? Can I use white sugar?

Brown sugar is essential here for its molasses content, which adds moisture and caramel undertones. White sugar can be substituted in a pinch, but expect a less rich flavor and a slightly dryer texture.

Are these Sourdough Blondies gluten-free?

Not as written. To make a gluten-free version, you’d need to substitute the all-purpose flour with a gluten-free blend that can mimic its structure, but results may vary. Also, ensure your sourdough discard is gluten-free.

Why do sourdough discard blondies taste different from regular blondies?

The sourdough discard adds a pleasant mild tang and complexity of flavor that regular blondies don’t have. It also contributes to a moister texture, making these blondies feel a little more special and nuanced.

Can I add nuts or other mix-ins?

Absolutely! Chopped walnuts, pecans, or even toffee bits make fantastic additions. Just fold them in with the chocolate chips for extra texture and flavor diversity.

Final Thoughts

Trying this Sourdough Blondies Recipe is such a rewarding way to use up sourdough discard while crafting a dessert that’s truly memorable. Whether you’re baking for a crowd or craving a cozy treat, these blondies feel like a warm hug in dessert form. Grab your ingredients, get baking, and enjoy every chewy, chocolaty bite with a big smile!

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Sourdough Blondies Recipe

Sourdough Blondies Recipe


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3.9 from 12 reviews

  • Author: Chef
  • Total Time: 35 minutes
  • Yield: 12 servings

Description

These Sourdough Blondies combine the tangy depth of sourdough discard with the rich sweetness of brown sugar and semi-sweet chocolate chips, creating a chewy and decadent dessert bar that is perfectly soft in the center and lightly golden on the edges.


Ingredients

Dry Ingredients

  • 1 cup All Purpose Flour
  • ½ teaspoon Baking Powder

Wet Ingredients

  • ½ cup Butter, Softened
  • 1 cup Brown Sugar
  • 1 unit Egg
  • 2 teaspoons Vanilla Extract
  • ½ cup Sourdough Discard (Unfed, Inactive)

Add-ins

  • 1 ½ cups Semi-Sweet Chocolate Chips (reserve some for topping)


Instructions

  1. Preheat and Prepare Pan. Preheat your oven to 350°F (175°C) and line an 8×8 inch baking pan with parchment paper to ensure easy removal of the blondies after baking.
  2. Cream Butter and Sugar. In a mixing bowl, cream the softened butter with the brown sugar by hand until the mixture is pale and silky, about 2-3 minutes. This step helps incorporate air, giving the blondies a tender crumb.
  3. Add Egg and Vanilla. Add the egg and vanilla extract to the butter-sugar mixture and mix well until smooth and fully combined, forming the base for the batter.
  4. Incorporate Sourdough Discard. Fold in the sourdough discard until it is fully incorporated, which adds moisture and a subtle tang to the blondies.
  5. Mix Dry Ingredients. In a separate bowl, whisk together the all-purpose flour and baking powder, then sprinkle these dry ingredients over the wet mixture. Gently mix until just combined to avoid overworking the batter.
  6. Add Chocolate Chips. Fold in the chocolate chips, reserving some to sprinkle on top of the batter for an attractive finish and extra chocolatey texture.
  7. Spread and Bake. Spread the batter evenly in the prepared pan and bake in the preheated oven for 22-28 minutes, or until the center is set but still slightly soft to ensure a chewy texture.
  8. Cool and Slice. Allow the blondies to cool completely in the pan. Once cooled, lift them out using the parchment paper and slice into 12 squares for serving.

Notes

  • Use unfed, inactive sourdough discard to avoid adding extra leavening to the blondies.
  • Do not overmix once the dry ingredients are added to prevent tough blondies.
  • Check the blondies near the end of baking time to avoid overbaking which could dry them out.
  • Store blondies in an airtight container at room temperature for up to 3 days or refrigerate for longer freshness.
  • For a dairy-free version, substitute the butter with a plant-based alternative.
  • Prep Time: 10 minutes
  • Cook Time: 25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

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