If you have been looking for a reason to keep your sourdough discard instead of tossing it, this sourdough discard peanut butter cookies recipe is it.
These cookies are soft and chewy with beautifully crackled tops, crispy buttery edges, and an intensely rich peanut butter flavor that gets a subtle, irresistible tang from the discard.
The sourdough discard does more than just use up leftovers. It adds moisture, a hint of depth, and a complexity that regular peanut butter cookies simply don’t have.
Best of all, this recipe comes together in one bowl with no chilling required and no fancy equipment. You can have fresh, bakery-quality cookies on the table in under an hour.
If you love finding creative ways to bake with your discard, you will want to bookmark this one. It has quickly become one of the most satisfying and crowd-pleasing recipes you can make with that little jar of discard sitting in your fridge.
Why You’ll Love This Sourdough Discard Peanut Butter Cookies Recipe
These cookies check every single box for what a great peanut butter cookie should be.
They are deeply flavorful, genuinely chewy, and easy enough to pull together on a weeknight without any fuss.
- Uses your sourdough discard: No more guilt about throwing it away. This recipe uses it beautifully and rewards you with something delicious.
- One-bowl recipe: Fewer dishes, less cleanup, and a streamlined baking process that anyone can follow.
- No chilling required: The dough bakes up perfectly straight from mixing. You do not have to wait for it to firm up in the fridge.
- Soft and chewy texture: The combination of butter, brown sugar, and sourdough discard creates a cookie that stays tender for days.
- Rich peanut butter flavor: Every single bite is packed with nutty, salty-sweet peanut butter goodness.
- Subtle tang: The discard adds a gentle tang that balances the sweetness and gives these cookies a bakery-level depth.
- Beginner-friendly: The steps are simple and forgiving, making this a great recipe even if you are new to sourdough baking.
You might also enjoy these Sourdough Discard Chocolate Chip Cookies if you are building up your sourdough discard baking repertoire.
Ingredients
You only need simple pantry staples for this recipe. The sourdough discard does a lot of the heavy lifting, adding moisture and flavor so you do not need any unusual ingredients.
- 1/2 cup (115g) unsalted butter, softened to room temperature
- 1/2 cup (100g) granulated white sugar, plus extra for rolling
- 1/2 cup (110g) packed light brown sugar
- 1 cup (250g) creamy peanut butter (not natural or chunky)
- 1 large egg, room temperature
- 1 teaspoon vanilla extract
- 1/2 cup (120g) sourdough discard, unfed, stirred well
- 1 1/2 cups (190g) all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon baking powder
- 1/2 teaspoon fine salt
A note on the peanut butter: Stick with commercial creamy peanut butter such as Jif or Skippy for this recipe. Natural peanut butter has too much oil separation and can make the cookies greasy and crumbly. Creamy peanut butter gives these cookies their signature chewy texture.
A note on the discard: You can use discard straight from the fridge without feeding it first. Discard that is under 5 days old will give a milder flavor, while older, more acidic discard will add a more pronounced tang.
Read Also: Sourdough Discard Oatmeal Cookies Recipe
Kitchen Equipment Needed
You do not need any special tools for this recipe. A hand mixer makes the job easier, but even a bowl and a fork will work.
- Large mixing bowl
- Electric hand mixer or stand mixer (optional but helpful)
- Measuring cups and spoons
- Kitchen scale (recommended for accuracy)
- Cookie scoop (1.5 tablespoon size)
- Baking sheets
- Parchment paper or silicone baking mats
- Wire cooling rack
- Fork (for the classic crosshatch pattern)
- Rubber spatula
Another great discard recipe to try next: Sourdough Discard Sugar Cookies Recipe
Recommended Products for This Recipe
These are products that genuinely make a difference when baking sourdough discard cookies. Each one is recommended based on quality and performance.
1. OXO Good Grips Cookie Scoop
A consistent cookie scoop ensures all your cookies are the same size, which means they bake evenly and finish at the same time. This eliminates the frustration of some cookies being overdone while others are underbaked. It is a small investment that makes a big difference.
2. Nordic Ware Natural Aluminum Half Sheet Pan
Heavy-gauge aluminum baking sheets distribute heat evenly, preventing hot spots that can burn the bottoms of your cookies before the tops are done. Thin, dark pans are one of the most common culprits behind overcooked cookie bottoms. A quality pan is one of the best upgrades you can make to your cookie baking.
3. KitchenAid Stand Mixer
While this recipe can be made with a hand mixer or even by hand, a stand mixer makes creaming butter and sugar effortless and ensures a consistently well-mixed dough. If you bake regularly, it is a tool that pays for itself quickly.
4. OXO Kitchen Scale
Weighing your ingredients, particularly your sourdough discard and flour, ensures accurate results every single time. The difference between a packed cup and a properly measured cup of flour can mean the difference between dry and perfectly chewy cookies.
For another great discard baking project, try these Sourdough Discard Brownies.
Step-by-Step Instructions
Step 1: Preheat the Oven and Prepare Your Baking Sheets
- Preheat your oven to 350°F (175°C). Position one oven rack in the center of the oven, as this is the sweet spot for even heat circulation.
- Line two large baking sheets with parchment paper or silicone baking mats. Do not use unlined, ungreased pans, as this can cause the bottoms to brown too quickly.
- Set the prepared baking sheets aside while you make the dough.
Step 2: Cream the Butter and Sugars
- Place the softened butter, granulated white sugar, and packed light brown sugar into a large mixing bowl.
- Using an electric hand mixer or stand mixer fitted with the paddle attachment, beat the mixture on medium speed for 2 to 3 minutes, until the mixture is light, fluffy, and noticeably paler in color.
- Scrape down the sides and bottom of the bowl with a rubber spatula to ensure everything is evenly combined.
- This creaming step is important. Properly creamed butter and sugar creates tiny air pockets that give the cookies their soft, chewy structure. Do not rush this step.
Step 3: Add the Peanut Butter, Egg, Vanilla, and Sourdough Discard
- Add the creamy peanut butter to the butter-sugar mixture and mix on medium speed for about 1 minute until fully combined and smooth.
- Add the large egg and vanilla extract. Mix on medium-low speed for about 30 seconds until just incorporated.
- Stir your sourdough discard well before measuring it out, especially if it has been sitting in the fridge. You want it evenly mixed, not separated.
- Add the sourdough discard to the bowl and mix on low speed until fully combined. Scrape down the sides of the bowl again.
- At this point, the wet mixture should look smooth, thick, and uniform.
Step 4: Mix the Dry Ingredients and Combine
- In a small separate bowl, whisk together the all-purpose flour, baking soda, baking powder, and fine salt until evenly combined.
- Add the dry ingredient mixture to the wet ingredients all at once.
- Mix on low speed until just combined and no streaks of dry flour remain. Do not overmix, as this can develop the gluten in the flour and make the cookies tough rather than tender.
- If needed, use your rubber spatula to fold in any remaining dry patches at the bottom of the bowl by hand.
- The dough will be thick and slightly sticky, which is exactly what you want.
Step 5: Portion and Roll the Dough
- Pour about 3 to 4 tablespoons of granulated sugar into a small shallow bowl. This is for rolling the dough balls.
- Using a 1.5 tablespoon cookie scoop, portion out even balls of dough.
- Roll each ball between your palms to smooth it into a neat sphere.
- Roll each dough ball in the granulated sugar until fully coated on all sides. This creates a light, sparkly crust on the outside of the baked cookie.
- Place the sugar-coated dough balls onto the prepared baking sheets, spacing them about 2 inches (5cm) apart. The cookies will spread during baking.
Step 6: Flatten the Cookies with a Fork
- Using the back of a dinner fork, gently press down on each dough ball to flatten it slightly. You are aiming for a disc about 1/2 inch (1.25cm) thick.
- Rotate the fork 90 degrees and press again to create the classic crosshatch pattern on top of each cookie. This is a traditional peanut butter cookie finishing technique and helps the cookies spread evenly.
- If the fork sticks to the dough, dip it lightly in the granulated sugar between pressings.
Step 7: Bake the Cookies
- Place one baking sheet at a time on the center rack of your preheated oven.
- Bake for 10 to 12 minutes. The edges should be set and just starting to turn golden, while the centers should still look slightly underdone and soft.
- Do not overbake. The cookies will firm up significantly as they cool. If they look fully set in the oven, they will be too firm once cooled.
- For the second tray, allow the oven to return to temperature for a few minutes before baking.
Step 8: Cool and Serve
- Remove the baking sheet from the oven and let the cookies rest on the pan for 5 minutes before transferring.
- After 5 minutes, use a spatula to transfer the cookies to a wire cooling rack.
- Allow the cookies to cool for at least 10 minutes before eating. They are fragile and very soft straight from the oven but firm up beautifully as they cool to room temperature.
- Serve and enjoy.
Read Also: Sourdough Discard Shortbread Recipe
Tips for Success
A few simple adjustments can take these cookies from good to outstanding. Keep these in mind before you start.
- Use room temperature butter: Cold butter will not cream properly with the sugars, which affects the texture of the finished cookie. Set your butter out about 30 to 45 minutes before baking.
- Do not use natural peanut butter: Natural peanut butter contains more oil and less stabilizers than commercial brands. It makes the dough greasy and can cause the cookies to spread too thin and become crumbly.
- Stir your discard well before measuring: Sourdough discard can separate in the fridge. Give it a good stir so the liquid and solids are evenly combined before adding it to the dough.
- Weigh your flour: Too much flour is the number one reason peanut butter cookies turn out dry and crumbly. Use a kitchen scale for the most accurate results, and always spoon flour into your measuring cup rather than scooping directly.
- Underbake slightly: The cookies should look soft and slightly underdone in the center when you pull them from the oven. They will set up perfectly as they cool.
- Do not skip the sugar rolling: Rolling the dough balls in granulated sugar before baking gives the cookies a subtle crunch and a beautiful sparkle on the outside.
- For long fermentation: If you want more tangy flavor and the potential digestive benefits of fermented grains, cover the dough and refrigerate it for 8 to 24 hours before baking.
Another favorite: Peanut Butter Cookie Recipe
Serving Suggestions
These cookies are wonderfully versatile and can be enjoyed in so many ways beyond just eating them straight off the cooling rack.
The rich peanut butter flavor pairs beautifully with cold milk, a scoop of vanilla ice cream, or a drizzle of warm chocolate ganache for an indulgent dessert plate.
- With a glass of cold milk: The classic pairing. The cold milk cuts through the richness of the peanut butter perfectly.
- As an ice cream sandwich: Press a scoop of vanilla or chocolate ice cream between two cookies for a dreamy frozen treat.
- With a hot drink: These cookies go beautifully with coffee, chai, or hot chocolate on a cozy afternoon.
- On a dessert platter: Arrange them alongside Sourdough Discard Blueberry Muffins and Sourdough Discard Pretzels for a stunning sweet and savory spread.
- Crumbled over yogurt: Break a cookie up over a bowl of Greek yogurt and granola for a next-level breakfast or snack.
- Gifted in a tin: These cookies make an absolutely lovely homemade gift. They hold up well for several days, making them a great choice for holiday cookie tins or care packages.
For a complementary treat, try these Peanut Butter Blossom Cookies.
Variations to Try
The base recipe is fantastic on its own, but there are plenty of fun ways to customize these cookies depending on your mood or what you have on hand.
- Peanut butter blossoms: Press a Hershey’s Kiss into the center of each cookie immediately after pulling them from the oven for the classic peanut butter blossom look.
- Chocolate chip peanut butter cookies: Fold 1/2 cup (85g) of semi-sweet or dark chocolate chips into the dough before portioning.
- Chunky peanut butter version: If you prefer some texture, chunky peanut butter can be used, though the cookies will be slightly less smooth and may spread a little differently.
- Peanut butter cup centers: Press a mini peanut butter cup into the center of each cookie straight out of the oven for an extra indulgent finish.
- Salted tops: Sprinkle a tiny pinch of flaky sea salt on top of each cookie before baking for a salty-sweet balance.
- Long fermented version: Mix the dough, cover tightly, and refrigerate for up to 24 hours before baking. This deepens the tangy flavor from the discard and may offer digestive benefits from the partial fermentation of the flour.
- Gluten-free adaptation: Substitute the all-purpose flour with a 1:1 gluten-free flour blend. Results may vary slightly in texture.
Read Also: Sourdough Discard Granola Recipe
Storage and Reheating
These cookies store beautifully and actually taste even better the next day once the flavors have had time to meld together.
Store them properly to keep them soft and chewy for as long as possible.
- Room temperature: Store cooled cookies in an airtight container at room temperature for up to 5 days. Place a slice of bread in the container to help maintain moisture.
- Refrigerator: Cookies can be stored in an airtight container in the fridge for up to 1 week. Let them come back to room temperature before eating for the best texture.
- Freezer (baked cookies): Place cooled cookies in a single layer on a baking sheet and freeze until solid, then transfer to a zip-top freezer bag or airtight container. Freeze for up to 3 months. Thaw at room temperature for 30 to 60 minutes before eating.
- Freezer (unbaked dough balls): Freeze portioned, sugar-rolled dough balls on a baking sheet until solid, then transfer to a freezer bag. Bake directly from frozen, adding 2 to 3 extra minutes to the bake time.
- Reheating: Warm a cookie in the microwave for 10 to 15 seconds to bring back that fresh-baked, soft texture.
For another great make-ahead discard recipe, check out these Sourdough Discard Cinnamon Rolls.
Nutritional Facts
The following is an approximate nutritional estimate per cookie, based on a yield of 24 cookies. Values will vary based on the specific brands and ingredients you use.
| Nutrient | Per Cookie (approx.) |
|---|---|
| Calories | 165 kcal |
| Total Fat | 9g |
| Saturated Fat | 3.5g |
| Cholesterol | 18mg |
| Sodium | 120mg |
| Total Carbohydrates | 19g |
| Dietary Fiber | 0.7g |
| Total Sugars | 12g |
| Protein | 4g |
Disclaimer: These are approximate values provided for general informational purposes. For precise dietary needs, use a dedicated nutrition calculator with your exact ingredients and measurements.
You might also love these Sourdough Discard Muffins for another nutritious and satisfying discard bake.
Health Benefits of Key Ingredients
Beyond being delicious, the main ingredients in these cookies offer some genuine nutritional value worth knowing about.
These cookies are, of course, a treat, but using wholesome ingredients means there is a little goodness baked into every bite.
- Peanut butter: A great source of plant-based protein, healthy monounsaturated fats, magnesium, and vitamin B6. It supports sustained energy and helps keep you fuller for longer.
- Sourdough discard: The fermentation process in sourdough starter partially breaks down the phytic acid in flour, which can improve the digestibility of the grains. Longer fermented dough (overnight chilling) enhances this effect.
- Eggs: Provide high-quality protein, choline for brain health, and a range of fat-soluble vitamins including A, D, E, and K.
- All-purpose flour: A source of carbohydrates for energy. The fermentation from the sourdough discard helps break down some of the starches over time.
- Brown sugar: Contains trace amounts of minerals like calcium, potassium, and iron compared to refined white sugar, though the quantities in a single cookie are modest.
Read Also: Sourdough Discard Banana Bread Recipe
Frequently Asked Questions
1. Can I use active sourdough starter instead of discard?
Yes, you can use active, bubbly sourdough starter in place of discard. However, make sure to stir it down well before measuring so you are adding a consistent amount of starter rather than a puffed-up, airy portion. The cookies will taste slightly less tangy but will still bake up beautifully. Active starter and discard are largely interchangeable in cookie recipes since no rising action is needed.
2. Why are my peanut butter cookies dry and crumbly?
The most common culprit is too much flour. If you scoop your measuring cup directly into the flour bag, you can end up with significantly more flour than the recipe intends. Always spoon flour into the measuring cup and level it off, or better yet, use a kitchen scale. Using natural peanut butter instead of commercial creamy peanut butter is another common cause. Natural peanut butter lacks the stabilizers needed to keep the cookies moist and cohesive.
3. Can I make these cookies ahead of time?
Absolutely. You can make the cookie dough up to 3 days in advance and store it covered in the fridge. When ready to bake, scoop the dough into balls, roll in sugar, press with a fork, and bake straight from the fridge, adding 1 to 2 extra minutes to the bake time. You can also freeze portioned dough balls for up to 3 months and bake directly from frozen.
4. Can I skip the fork crosshatch pattern?
The crosshatch pattern is traditional for peanut butter cookies and also serves a practical purpose. It presses the naturally dense dough down to a more even thickness, helping the cookies bake through properly. If you prefer a slightly different look, you can flatten the cookies with the bottom of a glass dipped in sugar instead. Do not skip flattening the cookies altogether, as they may bake up too thick and be raw in the center.
5. How do I know when the cookies are done baking?
The cookies are ready when the edges are set and just beginning to turn golden, but the centers still look soft, slightly underdone, and puffy. They may even look a little wet in the very center. This is correct. The residual heat from the hot pan will continue cooking the cookies as they cool, and they will firm up to the perfect chewy consistency within 10 to 15 minutes of coming out of the oven. If you wait until the centers look fully set in the oven, the cookies will be overbaked and dry once cooled.
This Sourdough Discard Coffee Cake Recipe is another fantastic discard recipe to try for your next baking session.
Final Thoughts
This sourdough discard peanut butter cookies recipe is one of those recipes that earns a permanent spot in your baking rotation.
It is easy, forgiving, endlessly satisfying, and a genuinely clever use of a byproduct that is far too good to throw away.
Every time you make these, you get soft, chewy, deeply peanut buttery cookies with that subtle sourdough tang that sets them apart from any standard peanut butter cookie you have ever had.
Give them a try the next time you feed your starter, and do not be surprised when they disappear within minutes.
Drop a comment below to let me know how yours turned out, and feel free to share this recipe with anyone who has a jar of sourdough discard and no idea what to do with it!
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