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Freshly baked sourdough discard brownies cooling on a wire rack, showing a glossy, fudgy texture.

Sourdough Discard Brownies


  • Author: Lydia Grace
  • Total Time: 35 minutes
  • Yield: 16

Ingredients

  • Unsalted butter – 1/2 cup (113g), melted
  • Granulated sugar – 1 cup (200g)
  • Brown sugar – 1/2 cup (100g) (dark or light, your choice!)
  • Large eggs – 2
  • Vanilla extract – 1 teaspoon (life’s too short for imitation vanilla, btw)
  • Sourdough discard – 1/2 cup (120g)
  • All-purpose flour – 1/2 cup (60g)
  • Unsweetened cocoa powder – 1/3 cup (40g)
  • Salt – 1/4 teaspoon
  • Baking powder – 1/2 teaspoon
  • Semi-sweet chocolate chips – 1/2 cup (optional, but highly encouraged)

Instructions

  1. Preheat oven to 350°F (175°C). Grease and parchment-line your 8×8 baking dish.
  2. Melt the butter in a microwave-safe bowl or on a stovetop. (Keep an eye out—it burns faster than you’d think!)
  3. Combine sugars in the large mixing bowl. Slowly drizzle in the melted butter, whisking gently.
  4. Add eggs one at a time, whisking until the mixture looks glossy. Go ahead, whisper “science” under your breath—it’s like brownie alchemy.
  5. Stir in vanilla extract and your sourdough discard. If it smells tangy, you’re doing this right.
  6. In a smaller bowl, whisk together flour, cocoa powder, salt, and baking powder. Slowly fold these dry ingredients into the wet batter until no lumps remain.
  7. Hit it with those chocolate chips (or nuts, if that’s the vibe). And…maybe taste test? Just a little bit.
  8. Pour batter into the pan and spread it evenly with your spatula.
  9. Bake for 25–30 minutes. The top should look set, and a toothpick should have moist crumbs (not wet batter).
  10. Let them cool completely (or dangerously close to completely) before cutting into squares
  • Prep Time: 10
  • Cook Time: 25

Keywords: Sourdough Discard Brownies