If you have extra sourdough starter sitting in your fridge, don’t let it go to waste. One of my favorite ways to use sourdough discard is by turning it into rich, buttery desserts. This sourdough dessert recipe makes soft, chewy brown butter blondies with crispy edges, gooey centers, and just the right amount of caramel flavor. You don’t really taste the sourdough itself, but it adds a slight tang that balances all the sweetness beautifully.

This recipe is perfect for beginner bakers and uses simple pantry ingredients you can easily find at most American grocery stores like Walmart, Target, Kroger, Aldi, or Costco.

Why You’ll Love This Sourdough Dessert Recipe

This easy sourdough dessert is rich without being overly sweet, has an amazing chewy texture, and is a fantastic way to reduce food waste by using sourdough discard. The brown butter adds a deep nutty flavor that makes these blondies taste like something from a local bakery. I honestly think they taste even better the next day… if they actually last that long.

How I Came Across This Recipe

A few years ago I started baking sourdough bread almost every weekend, and before I knew it, I had jars of sourdough discard filling the refrigerator. Throwing it away felt wasteful, so I started experimenting with desserts instead of bread.

The first batch wasn’t perfect because I baked it a little too long, but the flavor was amazing. After adjusting the baking time and adding brown butter, these blondies became one of the most requested desserts in my house. My family always ask me to make them whenever we have a movie night or weekend barbecue.

Sourdough Dessert Recipe (Easy Brown Butter Sourdough Blondies)

Recipe by Amazing Ruth

0.0 from 0 votes

Course: DessertCuisine: AmericanDifficulty: Easy

Servings

16

servings

Prep time

15

minutes

Cooking time

30

minutes

Calories

285

kcal

Total time

45

minutes

These Brown Butter Sourdough Blondies are soft, chewy, buttery, and loaded with rich caramel flavor. They’re the perfect way to use sourdough discard while creating an easy homemade dessert that everyone will love. Crispy edges, gooey centers, and plenty of chocolate make this recipe a family favorite.

Ingredients

• Blondie Batter

• 1 cup unsalted butter, browned

• 1 cup light brown sugar, packed

• ½ cup granulated sugar

• 1 cup sourdough discard (unfed, room temperature)

• 2 large eggs

• 2 teaspoons pure vanilla extract

• 2 cups all-purpose flour

• 1 teaspoon baking powder

• ½ teaspoon baking soda

• ½ teaspoon fine sea salt

• 1 teaspoon ground cinnamon (optional)

• 1 cup semi-sweet chocolate chips

• ½ cup chopped pecans or walnuts (optional)

Directions

• Preheat the oven to 350°F (175°C) and line a 9×13-inch baking pan with parchment paper or lightly grease it.
• Melt the butter in a saucepan over medium heat until it turns golden brown and develops a nutty aroma. Let it cool for about 10 minutes.
• In a large mixing bowl, whisk together the browned butter, brown sugar, and granulated sugar until smooth.
• Add the sourdough discard, eggs, and vanilla extract. Mix until fully combined.
• In another bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon.
• Gradually add the dry ingredients into the wet ingredients. Stir gently until no dry flour remains. Do not overmix.
• Fold in the chocolate chips and chopped pecans or walnuts, if using.
• Spread the batter evenly into the prepared baking pan using a spatula.
• Bake for 28–34 minutes, or until the edges are golden brown and a toothpick inserted near the center comes out with a few moist crumbs.
• Allow the blondies to cool in the pan for at least 30 minutes before slicing into squares.
• Serve warm or at room temperature with vanilla ice cream, whipped cream, or a hot cup of coffee.

See also  Gluten Free Blondies – Easy to Make Vegan Dessert Recipe

Notes

• Browning the butter gives these blondies a rich bakery-style flavor.
• Room-temperature sourdough discard mixes much more smoothly.
• Do not overbake; the center should still look slightly soft.
• Sprinkle flaky sea salt on top for a sweet-and-salty finish.
• Store in an airtight container for up to 4 days at room temperature or 1 week in the refrigerator.
• Freeze individual blondies for up to 3 months.

Equipment

• 9×13-inch baking pan
• Medium saucepan
• Large mixing bowl
• Medium mixing bowl
• Whisk
• Rubber spatula
• Measuring cups and spoons
• Cooling rack
• Parchment paper

Ingredient Notes

Brown butter is what really makes this dessert special. Cooking the butter until golden creates a rich, toasted flavor that pairs perfectly with the slight tang from the sourdough starter.

Light brown sugar gives these blondies their soft, chewy texture and caramel taste.

Sourdough discard doesn’t make the dessert sour. Instead, it adds moisture, depth of flavor, and keeps the bars soft for several days.

Chocolate chips melt into little pockets of sweetness, while pecans add a nice crunch if you enjoy nuts.

My Best Tips

Don’t skip browning the butter because it makes a huge difference in flavor.

Room temperature sourdough discard blends much easier than cold discard.

Avoid overbaking. The center should look just a tiny bit soft when removing from the oven because it continues cooking while cooling.

Adding flaky sea salt on top before serving gives these blondies a bakery-style finish that everybody seems to love.

Estimated Cost

Most ingredients are common pantry staples. Using average grocery prices in the United States, this recipe costs about $10 to $13 to prepare and makes approximately 16 generous servings, making it a budget-friendly homemade dessert for family gatherings.

Best Time to Enjoy

This sourdough dessert recipe is wonderful as an afternoon snack, after-dinner dessert, or weekend baking project.

Best Season

Fall and winter are especially perfect because the warm brown butter and cinnamon flavors feel cozy, although it’s honestly delicious all year long.

Best Mood

Bake this recipe when you’re feeling cozy, creative, or simply want to use up extra sourdough discard instead of wasting it.

Perfect Occasions

• Family game nights
• Holiday dessert tables
• Potluck dinners
• Backyard BBQs
• Weekend baking
• Birthday parties
• School bake sales
• Coffee dates with friends

Frequently Asked Questions

Can I use active sourdough starter instead of discard?

Yes. Either active starter or unfed discard works well. Discard simply gives you a great way to use leftovers.

Can I freeze these blondies?

Absolutely. Wrap individual pieces tightly and freeze for up to 3 months. Thaw at room temperature before serving.

Why doesn’t the dessert taste sour?

The sugar, butter, vanilla, and chocolate balance the mild tang from the sourdough, creating a deeper flavor instead of a sour taste.

Can I make these without nuts?

Yes. Simply leave them out if you prefer or replace them with extra chocolate chips, white chocolate chips, or butterscotch chips.

How should I store leftovers?

Keep the blondies in an airtight container at room temperature for up to 4 days or refrigerate for up to one week. They stay soft and chewy, maybe even a little better on day two.