Sourdough Salted Peanut Butter Cookies
Yields: 18–24 cookies
Prep: 15 min
Chill: 30 min (optional but recommended)
Bake: 10–12 min
Ingredients
Dry Ingredients
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1½ cups (190 g) all-purpose flour
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½ tsp baking soda
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¼ tsp baking powder
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½ tsp salt
Wet Ingredients
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½ cup (113 g) unsalted butter, softened
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½ cup (100 g) brown sugar, packed
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¼ cup (50 g) granulated sugar
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1 large egg, room temp
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½ cup (120 g) creamy peanut butter (natural or regular)
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½ cup (120 g) sourdough discard (unfed, room temperature)
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1 tsp vanilla extract
Topping
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Flaky sea salt (Maldon or similar)
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¼ cup (50 g) granulated sugar (for rolling, optional)
Optional Add-ins
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½ cup chocolate chips or chopped peanuts
Method
1. Preheat & Prep
Preheat oven to 175°C (350°F). Line two baking sheets with parchment paper or silicone mats.
2. Mix Dry Ingredients
In a medium bowl, whisk together flour, baking soda, baking powder, and salt. Set aside.
3. Cream Butter & Sugars
In a large bowl, beat softened butter, brown sugar, and granulated sugar until light and fluffy (about 2–3 minutes).
4. Add Wet Ingredients
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Beat in peanut butter until smooth.
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Add egg, sourdough discard, and vanilla extract. Mix until just combined (don’t overbeat).
5. Combine
Gradually add dry ingredients to wet mixture, mixing until just incorporated. Dough will be soft but not sticky.
6. Chill (Optional but Recommended)
Cover dough and refrigerate 30 minutes — this prevents excessive spreading and deepens flavor.
7. Shape & Roll
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Scoop dough into 1.5-tablespoon balls (about 30g each).
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Roll in granulated sugar (if using) for a crackly top.
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Place 2 inches apart on baking sheets.
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Flatten slightly with a fork in a crisscross pattern (dip fork in sugar to prevent sticking).
8. Top with Salt
Sprinkle each cookie with a pinch of flaky sea salt before baking.
9. Bake
Bake 10–12 minutes until edges are golden brown and centers look slightly underdone.
(They will firm up as they cool.)
10. Cool
Let cookies rest on baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
💡 Sourdough Tips
| Tip | Why |
|---|---|
| Use unfed discard | Active starter makes cookies too puffy; discard = tender, slightly tangy |
| Room temp discard | Cold discard seizes butter and creates lumps |
| Don’t skip the salt topping | Balances sweetness + enhances peanut butter + sour tang |
| Chill dough | Prevents flat, greasy cookies |