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.








You need these brownies in your life. Soft, thick, fudgey, rich, gooey. The sourdough starter gives it that extra oomph of flavor and texture that you never knew you were missing in a brownie.
I made a couple adjustments:
- used a mixture of dark, milk, and semi sweet chocolate
- added 1 tsp of espresso powder
- added dark chocolate chunks & chips
- made a double batch in a 9x13 pan, I baked mine for about 50 min but tbh they probably needed 5 min more (this was in a light pan)
Will absolutely make these again, definitely my new go to recipe!
Thank you for sharing Olivia! ๐
Absolutely DELICIOUS! Shiny top, super fudge & chewy too!!
This is a delicious recipe. How long would I bake them if I were to make brownie bite?
Or do you have a recipie for sourdough brownie bites?
If you put them in mini muffin tins, they should only need about 12 minutes to bake.
I've made this recipe 3 times now because it's such a hit with the crowds!
I use 1:1 gluten free flour and duck eggs instead of chicken eggs and it turns out great!
Beautiful, fluffy, chewy brownies - perfection! Used all the metric measurements with a scale
GREAT Brownies. YUM! I found that the amount of sourdough did not match up. 1/2 cup of my starter weighed 70 grams, not 125 grams (as per the recipe). I used 125 grams and that was close to 1 cup. I al3ays prefer to measuer in grams and not cups and that works for me.
Can this be made with an active starter? Itโs all I currently have on hand. Iโve made this recipe with my discard before and it was amazing!
Yes you can!
Wowwww! Amazing recipe and uses my discard. Will be making this again
Could I let the batter sit in the fridge or counter to get those added benefits of the sourdough?
Yes you can let it ferment for a few hours on the counter and/or in the fridge.
Do you bake at 350?
Yes ๐
Love this recipe. So fudgey and delicious. Added Carmel chips one time and hazelnuts another and were absolutely amazing and a big hit with guest. Thanks for sharing