Fudgy Sourdough Discard Brownies (Printable)

Rich, fudgy brownies with sourdough tang and flaky sea salt topping in every bite.

# What You Need:

→ Chocolate & Fats

01 - 6 oz dark chocolate (60–70% cocoa), chopped
02 - 1/2 cup unsalted butter, cubed
03 - 1/4 cup neutral oil (canola or vegetable)

→ Sugars

04 - 1 cup granulated sugar
05 - 1/2 cup light brown sugar, packed

→ Eggs & Sourdough

06 - 2 large eggs, at room temperature
07 - 1 large egg yolk
08 - 1/2 cup sourdough discard, unfed and at room temperature
09 - 1 teaspoon pure vanilla extract

→ Dry Ingredients

10 - 1/2 cup all-purpose flour
11 - 1/3 cup unsweetened Dutch-process cocoa powder
12 - 1/2 teaspoon fine sea salt

→ Topping

13 - Flaky sea salt, for sprinkling

# Directions:

01 - Preheat oven to 350°F. Line an 8x8 inch baking pan with parchment paper, leaving overhang on two sides for easy removal.
02 - In a heatproof bowl set over a pan of simmering water, melt chocolate and butter together, stirring until smooth. Remove from heat and whisk in oil until fully incorporated.
03 - Whisk in both granulated and brown sugars until the mixture becomes glossy and well combined.
04 - Add eggs and egg yolk one at a time, whisking thoroughly after each addition. Whisk vigorously for 1–2 minutes until the mixture becomes thick and shiny.
05 - Stir in sourdough discard and vanilla extract until fully incorporated into the batter.
06 - Sift together flour, cocoa powder, and fine sea salt. Fold gently into the wet mixture using a spatula until just combined; avoid overmixing.
07 - Pour batter into the prepared pan and smooth the top surface evenly. Sprinkle generously with flaky sea salt.
08 - Bake for 28–32 minutes, or until the edges are set but the center remains slightly soft. A toothpick inserted should come out with moist crumbs, not wet batter.
09 - Cool completely in the pan on a wire rack before lifting out using the parchment overhang. Slice into 16 equal squares.

# Expert Suggestions:

01 -
  • The sourdough discard adds a subtle tang that makes the chocolate taste more complex and sophisticated without screaming "I have a starter."
  • You get restaurant-quality fudgy brownies in under an hour with ingredients most bakers already keep stocked.
  • That flaky sea salt on top feels like a tiny luxury, the kind of finish that makes people ask for the recipe.
02 -
  • Do not skip the cooling step—I learned this the hard way by cutting into warm brownies and watching them crumble into delicious but disappointing rubble.
  • The "moist crumbs" test is everything; a clean toothpick means you've baked past the fudgy zone and into ordinary brownie territory.
  • Sourdough discard consistency varies wildly, so if yours is particularly thick, mix it with 1 teaspoon of water before folding in.
03 -
  • Room temperature eggs really do matter here—if yours are cold, set them in a bowl of warm water for five minutes before cracking them in.
  • Use the highest quality chocolate you can justify; it's the foundation, and there's nowhere to hide mediocre chocolate in a brownie.
  • That flaky sea salt on top is where the magic lives, so don't think of it as optional seasoning—it's a core part of the flavor balance.
Return