Sourdough Brownies
This recipe makes the best sourdough brownies. They are rich and fudgy, with thick gooey centers and shiny crackly tops. Don't throw away that sourdough discard. Make a sweet treat and satisfy your chocolate cravings at the same time!

If you have a sourdough starter, then you're bound to end up with discard and don't want to throw it away. That's one of the reasons why we love to share sourdough discard recipes.
This recipe for sourdough brownies is sure to make any chocolate lover very, very happy!
Recipe highlights
- great use for sourdough discard: Cut down on food waste. There's no need to throw away starter when you have a good recipe to use it in!
- thick and fudgy: These bad boys are full of ooey, gooey goodness, with fudgy centers and crackly tops.
- rich chocolate flavor: These sourdough brownies are everything you think of when you're craving a decadent chocolate dessert.
- easy to make: This is a simple brownie recipe that only requires a few steps and common pantry ingredients.
What you'll need
- eggs, dark brown sugar and granulated sugar: You'll beat these together to make a "meringue" that creates that beautiful, shiny crust on top!
- butter, dutched cocoa powder, vanilla extract and chocolate chips: These ingredients get melted together on the stovetop. The heat "blooms" the chocolate, bringing out even more depth of flavor.
- flour and salt: These are added last and folded in with a spatula to keep the batter from being over-mixed.
Step by step instructions
Before you start mixing the ingredients, preheat your oven to 350ยฐF (176ยฐC) and line a 9" x 9" baking dish with parchment paper.
Step 1: Melt the butter in a saucepan over medium-low heat. Add the vanilla extract and chocolate chips and stir until the chocolate has melted. Add the cocoa powder and stir until the mixture is smooth. Set aside and allow it to cool.

Step 2: In a large mixing bowl or a stand mixer with the whisk attachment, beat the eggs, granulated sugar and dark brown sugar on medium-high speed for 7-10 minutes. Add the sourdough starter discard and chocolate mixture to the bowl and beat on low speed to combine.

Step 3: Add the flour and salt to the bowl and use a spatula to gently stir them into the batter.

Step 4: Pour the batter into the baking dish, smooth evenly and bake for 35-40 minutes.

Remove from the oven and allow the brownies to cool completely in the baking dish before cutting into squares.

Frequently asked questions
How do I know when the brownies are done? It's important not to over-bake the sourdough brownies. You'll know when they are done when the edges are set but still appears slightly under baked in the center. The brownies will continue to cook as they cool in the pan, which is another reason they must cool before you cut them!
What kind of flour should I use for brownies? All-purpose flour is best for baking brownies. Cake flour should be avoided as it will produce a brownie with less structure and be soft and "cake-like".
Can I use regular cocoa powder? Yes you can. We've tested this recipe with cocoa powder and separately with dutched cocoa powder. Both produced excellent results. Use dutched cocoa powder for a deeper chocolate flavor.
Can I use only one type of sugar in this recipe? Yes you can. We like the added depth of flavor brown sugar adds, but feel free to use all brown sugar or all granulated sugar. Brown sugar adds moisture to the batter so you may need to adjust baking time if you alter the recipe.
Do I have to use parchment paper? No, but it is highly recommended for two reasons. Not only does parchment paper prevent the brownies from sticking to the pan, it acts like a sling to easily lift them up and out in one big piece before cutting into squares.
How to store and freeze
- To Store: Allow the brownies to cool completely after they come out of the oven. Store them in an airtight container or cover with plastic wrap. Keep them at room temperature for up to 7 days.
- To Freeze: After brownies have cooled, wrap individual baked brownies in plastic wrap and place in a freezer-safe container or bag. Keep in the freezer for up to 3 months.
- To Reheat: Allow brownies to thaw, if frozen. Place in the microwave for 10-15 seconds on high.
Recommended kitchen tools
- 9" x 9" baking dish (affiliate link)
- electric mixer (affiliate link)
- heavy saucepan (affiliate link)
More easy sourdough discard recipes
Looking for an easy recipe to make with your sourdough discard? Make something fun like homemade sourdough vanilla cake, sourdough sugar cookie bars, sourdough pop tarts, sourdough chocolate chip cookies or double chocolate sourdough muffins.
Don't have a sweet tooth? Bake up an easy snack of sourdough discard crackers. Or try one of our reader favorites, sourdough pizza crust, for a delicious brick-oven style pizza at home!
Browse through our collection of sourdough discard recipes to find something your family will rave about!

Sourdough Brownies Recipe
INGREDIENTS
- 8 tablespoons (113 g) unsalted butter
- 12 oz. (340 g) semi sweet chocolate chips
- ยฝ cup (40 g) dutched cocoa powder (or regular cocoa powder)
- 2 teaspoons (10 g) vanilla extract
- 2 large eggs
- 1 egg yolk
- 1 cup (200 g) granulated sugar
- ยฝ cup (110 g) dark brown sugar
- ยฝ cup (125 g) sourdough starter discard
- 1 cup (120 g) all-purpose flour
- 1 teaspoon (5 g) salt
INSTRUCTIONS
- Preheat oven to 350ยฐF (176ยฐC) and line a 9" x 9" baking dish with parchment paper.
- Melt the butter in a small saucepan over low heat. Add the chocolate chips, vanilla extract and dutched cocoa powder. Stir the ingredients until the chocolate chips have melted and the mixture is smooth. Remove the saucepan from the burner and set it aside to cool down.

- In a large mixing bowl, beat the eggs, brown sugar and granulated sugar with an electric mixer for 7-10 minutes. Add the sourdough discard and chocolate mixture to the bowl beat on low until combined. Add the flour and salt and stir with a spatula until just combined. (The batter will be very thick.)

- Pour the batter into the baking dish and smooth the top. Bake for 35-40 minutes.

- Allow the brownies to cool completely in the pan after they come out of the oven. Remove the brownies from the pan by lifting them with the parchment paper and cut into squares.

NOTES
- To Store: Allow the brownies to cool completely after they come out of the oven. Store them in an airtight container or cover with plastic wrap. Keep them at room temperature for up to 7 days.
- To Freeze: After brownies have cooled, wrap individual baked brownies in plastic wrap and place in a freezer-safe container or bag. Keep in the freezer for up to three months.
- To Reheat: Allow brownies to thaw, if frozen. Place in the microwave for 10-15 seconds on high.








Can I use active starter instead of discard? Iโm impatient to make these, lol!
Hi Amy, yes you can! You can always use active starter in place of discard.
Could these be made in an 8x8 pan? Any changes to time while baking? Thank you!!
Hi Amber, you may just need to cook them a little longer. Add 10 minutes and then check and if a toothpick comes out clean they should be ready. If not, Add 5-10 more if needed.
These are amazing!! I used 60% dark chips and mixed extra in the batter. Best brownies I have EVER had!
This is a new favorite in my household. Thank you so much for sharing your knowledge!
Flavor was outstanding!!! Followed intructions exactly, even baking 10 minutes longer than recipe stated. Completely raw in the center!! I think the next time I bake them, I will raise the temp to 375, and bake for 40 minutes and see how it turn out. Like I said, taste was the absolute best! Don't like a raw center. You should not have to eat soupy brownies with a spoon,
Hi Becky, I'm so sorry to hear your brownies came out raw in the center. We have never had this issue before. Most of the time it's because of the oven temperature. If you cooked it the full length of time, you may need to check your oven temperature. Oven temperatures vary and you can buy an inexpensive oven thermometer to verify your oven is heating to the correct temperature.
Iโm gaining a cult following over these brownies. Seriously. They are adored by everyone!
Can I double the brownie recipe?
Hi Donna, yes you can.
I loved it! Doubled it only using 4 eggs and one 12 oz pack if semi sweet chocolate chips. Cooked in a 9x 13. Perfect!
Iโve been experimenting with all kinds of sourdough discard recipes, and I have to say this is an excellent brownie recipe. Iโm really pleased with the flavor and the texture.
Thank you, April!
This is the BEST ever brownie discard recipe! My daughter in Knoxville, TN has requested these for the children's lunchbox treat! I find they freeze well and I share them with my grands when they visit me in the "fringe" of central time zone!!!
Heck, even my husband has requested these too! Thanks so much for sharing your recipes and knowledge!!! Thanks so much!!!!
Thank you, Katherine!