Sourdough Brownies

Sourdough Chocolate Brownies

Do you have some sourdough starter or discard in your fridge or on the counter that is just begging to be used up? Make these delicious fudgy brownies. They are so easy and absolutely delicious. You can make these brownies with sourdough starter or discard and they come out amazing every single time. Serve them up warm with some vanilla ice cream and it is an amazing dessert.

Let’s get started.


1 stick butter – unsalted
1 cup semi-sweet chocolate chips ( or dark chocolate chips)
3 eggs – room temp
1/2 cup sugar
3/4 cup brown sugar
1/2 cup sourdough starter or discard
1 cup all-purpose flour
1/2 cup cocoa powder
1 tsp kosher salt (or 1/2 tsp fine salt)
1 tsp vanilla extract


  1. Preheat the oven to 350* and grease and line an 8×8 or 9×9 inch baking dish with parchment. Set aside.
  2. In a saucepan over medium-low heat add the butter and cocoa powder. Whisk until the cocoa powder and butter are melted and smooth. Remove from the heat and stir in the chocolate chips. Let stand for about 3 to 5 minutes to melt. Stir until melted fully. Let cool slightly.
  3. In the meantime, Add the sugar, brown sugar, flour, and salt to a bowl and whisk until well combined and incorporated.
  4. To the flour mixture add the eggs, sourdough starter/discard, vanilla, and the cooled chocolate mixture. Stir with a rubber spatula until well combined and smooth.
  5. Pour the batter into your prepared dish and bake for 25 to 35 minutes. The center should be slightly undercooked. A toothpick should come out with a little batter on it. You can cook this longer if you want the center to be more cooked and less fudgy in the center.
  6. Remove from the oven and let cool in the pan for about 10 to 15 minutes. Remove to a wire rack to cool completely. When cooled completely you can cut them into 9 equal squares and place them in a container with a lid in the fridge.
  • You can add more chocolate chips to this before baking if you want pieces of chocolate chips in the batter. You can also add nuts to the batter before baking as well. I like to toast the nuts and let them cool before adding them to the batter. I find it enhances the flavor of the nuts.
  • You can cook the batter an extra 10 minutes or until the center is more cooked throughout and less fudgy in the center. I know some do not like fudgy-style brownies and like them more cake-like. The chocolate chips in the batter will, however, Keep them slightly fudgy in the center.
  • If you do not have sourdough you can make your own. Check out my post for my sourdough starter. You can also sub out the sourdough starter and add in 1 1/2 tsp baking powder, 1/2 tsp baking soda, and 1/2 cup (or slightly less than) of buttermilk or milk. I would add a little bit until you get a thick batter. You do not want this batter to be runny.
  • Serve warm with vanilla ice cream or chilled as a treat. However you serve these up, they are a tasty treat.

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