Sourdough discard brownies are about to become your new favorite way to use up that extra starter sitting in your fridge. I’m talking fudgy, chewy, deeply chocolatey brownies that come together in one bowl and taste like they came from a fancy bakery.
I started making these after a weekend baking session with Isabella and Emma. We had a jar of discard that was about to go to waste, and I thought… why not throw it into brownies? Trust me, the result blew us away. Henry went back for seconds (and thirds), and Noah kept asking if we could make them “every single day.”
If you love a good from scratch brownie recipe, this one belongs in your rotation. Plus, if you’re into baking with sourdough starter, you’ll also love my easy banana bread recipe.
Why You Will Like This Recipe
- Super fudgy with chewy edges and a soft center
- Uses up sourdough starter discard you’d otherwise toss
- Ready in under an hour with basic pantry ingredients
- The sourdough adds moisture without any sour taste
- Perfect for meal prep freezes beautifully for up to 3 months
Ingredients for Sourdough Discard Brownies
For the chocolate blend:
- 12 oz semi-sweet chocolate chips (or dark chocolate for less sweetness)
- 1/2 cup unsalted butter (I like Kerrygold for this)
- 1/2 cup cocoa powder
- 2 tsp vanilla extract
For the wet ingredients:
- 1/2 cup sourdough starter discard (active or unfed works)
- 1 cup white sugar
- 1/2 cup packed brown sugar
- 2 large eggs
- 1 egg yolk (adds richness and chewiness)
For the dry ingredients:
- 1 cup plain flour
- 1 tsp salt
How to Make Sourdough Discard Brownies
- Preheat your oven to 350°F. Line a 9×9 baking dish with parchment paper on the bottom and sides.
- Melt butter in a saucepan over low heat. Add chocolate chips, cocoa powder, and vanilla. Stir until smooth, then set aside to cool slightly.
- In a large bowl, beat eggs, egg yolk, white sugar, and brown sugar with an electric mixer for 7-10 minutes until light and creamy.
- Add the sourdough discard and cooled chocolate mixture. Beat on low until combined.
- Fold in flour and salt with a spatula just until incorporated. The batter will be thick.
- Pour into the prepared dish, smooth the top, and bake for 35-40 minutes. A toothpick should come out with a few moist crumbs.
- Cool completely before slicing into squares.
Storage and Reheating
Store leftover chewy homemade brownies in an airtight container at room temperature for up to 4 days. For longer storage, refrigerate for up to a week. You can also freeze sliced brownies in a freezer bag for up to 3 months. Just thaw at room temperature when you’re ready to enjoy them.
Fun Variations for Your Chocolate Sourdough Dessert
- Swirl in peanut butter before baking for a peanut butter brownie twist
- Add a sprinkle of flaky sea salt on top right after baking
- Toss in a handful of walnuts or pecans for extra crunch
- Try white chocolate chips mixed in for a cookies-and-cream vibe
Ever tried adding espresso powder to brownies? Just a teaspoon deepens the chocolate flavor without making them taste like coffee.
Sourdough Discard Brownies Faqs
Can I use unfed sourdough discard in these brownies?
Yes! Unfed discard straight from the fridge works perfectly. Active or inactive, it doesn’t matter here both give the brownies great texture and extra moisture.
Do these brownies with sourdough discard taste sour?
Not at all. The chocolate, cocoa powder, and sugars balance everything out. You get rich, deep chocolate sourdough dessert flavor with zero tanginess.
How do I know when the brownies are done baking?
Insert a toothpick into the center. A few moist crumbs clinging to it means they’re perfect. Wet batter means they need more time. Overbaking will dry them out, so keep an eye on them around the 35-minute mark.
Can I freeze sourdough discard brownies?
Yes! Cool them completely, slice, and store in an airtight container or freezer bag for up to 3 months. They thaw quickly at room temperature.
Time to Bake These Beauties
These sourdough discard brownies are proof that the best recipes come from happy accidents in the kitchen. Fudgy, rich, and ridiculously easy what more could you want?
Give them a try and let me know how they turn out! Drop a comment below or be sure to tag me on Instagram. And don’t forget to save this recipe to Pinterest so you can find it whenever that sourdough discard jar starts filling up.
Recipes You May Like
- Easy Red Velvet Cheesecake Brownies another rich, fudgy treat you’ll love
- Easy Strawberry Brownies a fruity twist on classic brownies
- Heart Shaped Brownies perfect for special occasions
Happy baking
Sourdough Discard Brownies
- Total Time: 55 minutes
- Yield: 16 brownies 1x
Description
Sourdough discard brownies are fudgy, chewy, and deeply chocolatey made in one bowl with basic pantry ingredients. They use up extra sourdough starter discard and taste like they came from a fancy bakery.
Ingredients
- For the chocolate blend:
- 12 oz semi-sweet chocolate chips
- 1/2 cup unsalted butter
- 1/2 cup cocoa powder
- 2 tsp vanilla extract
- For the wet ingredients:
- 1/2 cup sourdough starter discard
- 1 cup white sugar
- 1/2 cup packed brown sugar
- 2 large eggs
- 1 egg yolk
- For the dry ingredients:
- 1 cup plain flour
- 1 tsp salt
Instructions
- Preheat your oven to 350°F. Line a 9×9 baking dish with parchment paper on the bottom and sides.
- Melt butter in a saucepan over low heat. Add chocolate chips, cocoa powder, and vanilla. Stir until smooth, then set aside to cool slightly.
- In a large bowl, beat eggs, egg yolk, white sugar, and brown sugar with an electric mixer for 7-10 minutes until light and creamy.
- Add the sourdough discard and cooled chocolate mixture. Beat on low until combined.
- Fold in flour and salt with a spatula just until incorporated. The batter will be thick.
- Pour into the prepared dish, smooth the top, and bake for 35-40 minutes. A toothpick should come out with a few moist crumbs.
- Cool completely before slicing into squares.
Notes
Unfed discard straight from the fridge works perfectly active or inactive, both give great texture and extra moisture. The chocolate and sugars balance everything out so there’s zero sour taste. Keep an eye on them around the 35-minute mark to avoid overbaking. You can swirl in peanut butter before baking, add flaky sea salt on top, toss in walnuts or pecans, or try a teaspoon of espresso powder to deepen the chocolate flavor.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
