Preheat oven to 350 degrees and line a 9x9 baking dish with parchment paper. In a small saucepan over low heat, melt the butter. Whisk in the cocoa powder, vanilla extract, and chocolate chips until smooth. Remove from heat and let cool slightly.
Use an electric mixer to beat the eggs, brown sugar, and granulated sugar for about 8-10 minutes, or until light and fluffy. This helps create that shiny crinkle top brownies are known for.
Add the cooled chocolate mixture and sourdough discard to the bowl and beat on low until combined. Stir in the flour and salt just until no streaks remain.
Spread the brownie batter into the prepared baking pan and bake for 35-40 minutes, or until a toothpick inserted in the center comes out with moist crumbs.
Allow the brownies to cool completely before removing from the pan and cutting into squares.
Serve with a scoop of vanilla ice cream or your favorite brownie toppings.
Notes
Don’t overbake if you want extra fudgy brownies.
The brownies will continue to set as they cool.
Use parchment paper for easy removal and cleaner slices.
Store brownies in an airtight container for up to 4 days.
These sourdough discard brownies freeze well for up to 3 months.