Ingredients
1/2 cup (1 stick) unsalted butter, softened
1/2 cup brown sugar, packed
1/4 cup granulated sugar
1 large egg
1/2 cup sourdough discard (unfed, room temp)
1 teaspoon vanilla extract
3/4 cup all-purpose flour
1/2 cup unsweetened cocoa powder
1/2 teaspoon baking soda
1/4 teaspoon salt
3/4 cup chocolate chips or chunks
1/2 cup chopped walnuts or pecans (optional)
Instructions
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Preheat the Oven: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
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Cream the Butter and Sugars: In a large bowl, beat together butter, brown sugar, and granulated sugar until light and fluffy.
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Add Wet Ingredients: Mix in the egg, sourdough discard, and vanilla extract until smooth.
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Combine Dry Ingredients: In a separate bowl, whisk together flour, cocoa powder, baking soda, and salt.
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Make the Dough: Gradually add the dry ingredients to the wet mixture, stirring until just combined. Fold in chocolate chips and nuts (if using).
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Scoop the Dough: Drop tablespoon-sized scoops onto the prepared baking sheet, spacing about 2 inches apart.
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Bake: Bake for 10–12 minutes, or until the edges are set but centers are slightly soft. Let cool on the pan for 5 minutes, then transfer to a wire rack.
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Serve: Enjoy warm with a glass of milk or let cool completely and store in an airtight container for up to 5 days.