
These Sourdough Discard Brownies are super thick, chewy, and fudgy with a beautifully flaky top. Made with cocoa powder and chocolate chips, the techniques and ingredients used in this recipe guarantee better-than-box brownies every time.
Preheat oven to 350°F and position a rack in the middle of the oven. Butter and line an 8-inch aluminum square baking pan with parchment paper. Using an aluminum pan is critical for the brownies to cook through evenly.
In a medium saucepan, melt the butter over medium-low heat. Once melted, add the sugar and whisk until well combined and shiny (about 2-3 minutes). Remove from heat. Whisk in the eggs and egg yolks one at a time until smooth. Then add cocoa powder, sourdough discard, vanilla extract, coffee (if using), baking powder, and salt. Mix until well combined.
Add chocolate chips to the mixture and fold until mostly melted. Then gently fold in the flour until just combined.
Pour the batter into the prepared pan and spread it evenly. Bake for 60-75 minutes, or until a toothpick inserted into the center comes out clean. If the top begins to get too dark before the brownies are finished baking, loosely cover them with a piece of aluminum foil to prevent them from burning.
Let the brownies cool in the pan for 1 hour before removing them. Finish cooling on a wire rack. Once cooled, slice into 16 squares and serve.