As I stood in my kitchen, the comforting scent of brown butter filled the air, transporting me back to those sweet summer nights around the campfire. Today, I’m excited to share my recipe for Sourdough S’mores Cookies, a delightful twist on classic s’mores folded into a chewy, gooey cookie. Using sourdough discard not only adds a unique tangy flavor but also makes these cookies a fantastic way to reduce waste! With quick prep and a nostalgic taste that will make everyone feel at home, they are perfect for gatherings or a cozy night in. Are you ready to recreate those cherished memories with a delectable bite? Let’s dive in!

Why Are Sourdough S’mores Cookies So Special?
Nostalgic Flavors: These cookies capture the essence of classic s’mores, blending that childhood comfort into a cookie that’s perfect for any adult craving a sweet treat.
Unique Use of Discard: Transforming sourdough discard into delicious cookies not only minimizes waste but adds a delightful tang that elevates the overall flavor.
Texture Perfection: Each bite showcases a delightful contrast; crispy edges yield to a soft, chewy center filled with gooey chocolate and marshmallows.
Quick to Prepare: With minimal prep time, you can whip these up and enjoy them fresh from the oven, a great option when surprise guests arrive!
Versatile & Fun: Explore variations, whether adding peanut butter for a nutty twist or making seasonal delights like Pumpkin S’mores Cookies. Enjoy a warm cookie with a glass of milk or alongside a scoop of vanilla ice cream. Embrace the joy of baking with your loved ones!
Sourdough S’mores Cookies Ingredients
• Discover the magic of flavor in every bite!
For the Cookie Dough
- Unsalted Butter – Adds richness and flavor; feel free to use salted for a saltier kick.
- Brown Sugar – Contributes moisture and deeper sweetness; coconut sugar works as a flavorful swap.
- Granulated Sugar – Sweetens to perfection and helps get that chewy texture just right.
- Sourdough Discard (unfed) – Introduces a delightful tanginess that balances sweetness; recently fed starter can be a good substitute.
- Large Eggs – Binds the ingredients, ensuring a moist cookie.
- Vanilla Extract – Elevates sweetness and complexity of flavor.
- All-Purpose Flour – Provides necessary structure; be sure to measure properly for the best results.
- Baking Soda – A leavening agent for a light and airy texture.
- Baking Powder – Assists in achieving a perfect rise.
- Salt – Balances the sweetness to enhance all flavors.
For the Mix-Ins
- Semi-Sweet Chocolate Chunks – Melts into gooey pockets; dark chocolate can be used for bolder flavor.
- Mini Marshmallows – Create gooeyness throughout; substitute with cut standard marshmallows if needed.
- Chopped Graham Crackers – Adds crunch and emulates the classic s’more experience; opt for gluten-free versions if desired.
Dive into baking with these Sourdough S’mores Cookies and watch as they bring warmth and joy to your kitchen!
Step‑by‑Step Instructions for Sourdough S’mores Cookies
Step 1: Brown the Butter
Start by melting 1 cup of unsalted butter in a saucepan over medium heat. Stir occasionally until the butter turns a rich amber color and emits a nutty aroma, about 5-7 minutes. Once golden, remove it from heat and allow it to cool for 10-15 minutes—this step enhances the flavor of your Sourdough S’mores Cookies.
Step 2: Combine Wet Ingredients
In a large mixing bowl, combine the cooled brown butter with ¾ cup of brown sugar and ½ cup of granulated sugar using a hand mixer until the mixture is creamy and well-blended. Next, add 1 cup of sourdough discard, 2 large eggs, and 1 teaspoon of vanilla extract. Mix until all wet ingredients are smooth and uniform.
Step 3: Mix Dry Ingredients
In a separate bowl, whisk together 2 cups of all-purpose flour, ½ teaspoon of baking soda, ½ teaspoon of baking powder, and ½ teaspoon of salt. This combination will provide structure to your Sourdough S’mores Cookies, so make sure to sift and blend well to avoid lumps before integrating it into the wet mixture.
Step 4: Combine Mixtures
Gradually fold the dry ingredients into the wet mixture, mixing just until combined. Be careful not to overmix, as this can result in dense cookies. You should see a thick cookie dough starting to form, which will soon become the delicious bases for your Sourdough S’mores Cookies.
Step 5: Fold in Add-Ins
Using a spatula, gently fold in 1 cup of semi-sweet chocolate chunks, 1 cup of mini marshmallows, and ½ cup of chopped graham crackers until evenly distributed throughout the dough. This step adds the classic s’mores flavor and texture to your cookies, ensuring every bite is a gooey delight.
Step 6: Chill Dough (Optional)
For thicker cookies, cover the dough with plastic wrap and refrigerate for 30-60 minutes. Chilling helps the dough firm up, yielding a nice puffed texture when baked. If you’re short on time, you can skip this step, but keep in mind that warmer dough will spread more.
Step 7: Preheat Oven
While your dough chills, preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper. This setup ensures that your cookies bake evenly and don’t stick to the pan, giving you perfectly baked Sourdough S’mores Cookies each time.
Step 8: Scoop & Bake
Once chilled, scoop tablespoons of dough onto the prepared baking sheets, spacing them 2 inches apart. Bake in the preheated oven for 12-14 minutes, or until the edges are golden brown and the centers appear soft but not gooey. Remember, they will continue to cook slightly after being removed from the oven.
Step 9: Cool
After baking, let the Sourdough S’mores Cookies cool on the baking sheet for 5 minutes to firm up. Then, gently transfer them to a wire rack to cool completely. This cooling process allows the flavors to settle and will make them the perfect chewy treat ready to be devoured!

What to Serve with Sourdough S’mores Cookies?
Imagine the delight as you create a delightful meal that perfectly complements these chewy, gooey treasures fresh from the oven!
- Cold Milk: A classic pairing that balances sweetness and richness, enhancing each chocolatey bite.
- Vanilla Ice Cream: Elevate your cookie experience by serving warm cookies topped with a scoop of creamy vanilla bliss. The melt-in-your-mouth combo is pure indulgence!
- Roasted Fruit: Grilled peaches or caramelized bananas add a fresh, juicy contrast that lightens the rich flavors of the cookies.
- Coffee: A bold cup of coffee perfectly offsets the sweetness while amplifying the caramel notes from the brown sugar and brown butter.
- Nutty Trail Mix: Offer a crunchy element alongside your cookies, providing a wholesome snack option that balances the sweetness beautifully.
- Chocolate Milkshake: Indulge in nostalgia with this creamy treat, bringing together flavors that are reminiscent of classic s’mores in a delightful shake form.
- Fruit Salad: Fresh berries and melons bring brightness to the table, offering a refreshing counterpoint to the rich, gooey goodness of the cookies.
- Caramel Sauce: Drizzle warm caramel over cookies or ice cream for an extra layer of indulgent sweetness that will leave everyone craving more!
- Sparkling Water: Refreshing and light, sparkling water cleanses the palate between bites, allowing the unique flavors of the cookies to shine through.
Make Ahead Options
Sourdough S’mores Cookies are a fantastic option for busy home cooks looking to save time during hectic weeks! You can prepare the cookie dough up to 24 hours in advance and store it tightly wrapped in the refrigerator. To maintain the cookies’ delightful texture, be sure to chill the dough, which helps achieve those thick, chewy centers. When you’re ready to bake, simply scoop the chilled dough onto your baking sheets and follow the baking instructions as usual. For even more convenience, you can freeze unbaked cookie dough balls for up to 2 months. Just bake them directly from frozen, adding an extra minute or two to the bake time, and enjoy fresh Sourdough S’mores Cookies with minimal effort!
How to Store and Freeze Sourdough S’mores Cookies
Room Temperature: Store cookies in an airtight container at room temperature for up to 3 days; placing a slice of bread in the container helps maintain their softness.
Fridge: If you prefer, you can keep them in the fridge for up to a week, but be aware they may lose some of their chewy texture.
Freezer: Freeze baked Sourdough S’mores Cookies for up to 2 months; simply place them in a freezer-safe container or bag.
Unbaked Dough: For quick baking later, freeze unbaked dough balls for up to 3 months, baking from frozen while adding 1-2 minutes to the baking time.
Sourdough S’mores Cookies: Fun Variations
Customize your Sourdough S’mores Cookies and make them uniquely yours—let’s explore some delightful twists that add new dimensions to every bite!
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Nutty Bliss: Swirl creamy peanut butter into the dough for a irresistible nutty kick. It pairs beautifully with the chocolate and marshmallows, creating a decadent treat.
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Rich Dark Chocolate: Substitute semi-sweet chocolate chunks with dark chocolate for a more intense flavor. The deep cocoa notes elevate these cookies into pure bliss.
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Mocha Magic: Add 1 teaspoon of espresso powder for a subtle coffee flavor that enhances the chocolate. It’s a wonderful pick-me-up for those moments when you need a little extra warmth.
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Pumpkin Spice Delight: Use pumpkin puree in place of some of the butter and add pumpkin spice for a seasonal twist. These cookies will bring cozy autumn vibes even in the summer!
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Coconut Flake Surprise: Incorporate unsweetened shredded coconut for an added chewiness and tropical flair. Toasting them beforehand brings out a nutty flavor that will surprise your taste buds.
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Ginger Snap S’mores: Swap out the graham crackers for crushed ginger snaps. The zingy gingery flavor transforms them into a deliciously unique take on the classic.
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Spicy Treat: Add a pinch of cayenne pepper for a gentle heat that contrasts the sweetness. It’s a playful surprise that livens things up; perfect for adventurous eaters!
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Chewy Chocolate Oat Variation: Replace part of the all-purpose flour with oat flour for a chewy texture. This adds a delightful nuttiness and heartiness to your cookies, making them even more satisfying.
Dive into these variations and enjoy the endless possibilities of your Sourdough S’mores Cookies! Don’t forget to check out my delicious Chocolate Chip Cheesecake Cookies or try the rich flavors in my Chocolate Oat Cookies for even more delightful baking adventures!
Expert Tips for Sourdough S’mores Cookies
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Brown Butter Carefully: Make sure to watch the butter closely as it browns; burnt butter cannot be salvaged and will ruin the cookie’s flavor.
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Chill for Texture: Skipping the chilling step can lead to cookies that spread too much. For chewy, thicker cookies, chilling the dough is crucial.
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Control Marshmallow Melting: Keep marshmallows mostly tucked inside the dough to prevent them from melting completely out during baking.
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Measure Flour Correctly: For the best results, spoon and level your flour. Overpacking can result in dense Sourdough S’mores Cookies that miss the desired chewy texture.
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Use a Cookie Scoop: A large cookie scoop ensures uniform size and even baking, making it easier to achieve soft centers every time.

Sourdough S’mores Cookies Recipe FAQs
What is the best way to select ripe sourdough discard for baking?
Absolutely! For the best flavor, use sourdough discard that’s been sitting for at least 24 hours at room temperature. Look for discard that has a pleasant sour aroma and is bubbly—this indicates it’s active and will enhance your Sourdough S’mores Cookies’ flavor.
How should I store my Sourdough S’mores Cookies once baked?
Store your cookies in an airtight container at room temperature for up to 3 days. To keep them soft, I recommend placing a slice of bread in the container; it will absorb any excess moisture and maintain the cookies’ chewy texture.
Can I freeze Sourdough S’mores Cookies?
Yes, definitely! You can freeze baked Sourdough S’mores Cookies for up to 2 months. Just make sure to use a freezer-safe container or zip-top bag. For unbaked dough, freeze individual dough balls for up to 3 months, and when you’re ready to bake, just pull them from the freezer and add an extra 1-2 minutes to the baking time.
What can I do if my cookies come out too flat?
Very! Flat cookies can often result from warm dough. If this happens, try chilling your dough for 30-60 minutes before baking. If you forgot to chill, simply refrigerate the cookie dough while the oven preheats. Furthermore, double-check your flour measurement; measuring too little can also lead to spreading.
Are there any dietary considerations for pets or allergies with this recipe?
Great question! This recipe contains several potential allergens such as eggs and dairy (butter). If making for someone with allergies, consider using vegan butter or an egg substitute. Also, refrain from sharing these cookies with pets due to chocolate and sugar, which are harmful to them. Always inform guests of ingredients to cater to dietary needs!
How long can I keep unbaked dough in the refrigerator?
For the best results, you can keep unbaked dough in the fridge for up to 48 hours. Just make sure to wrap it tightly in plastic wrap to avoid drying out. When you’re ready to bake, just scoop and bake as instructed; no need to bring it back to room temperature. Enjoy your baking!

Irresistible Sourdough S’mores Cookies That Bring Joy
Ingredients
Equipment
Method
- Brown the Butter: Melt 1 cup of unsalted butter in a saucepan over medium heat until golden and nutty, about 5-7 minutes. Cool for 10-15 minutes.
- Combine Wet Ingredients: Mix cooled brown butter, 3/4 cup brown sugar, and 1/2 cup granulated sugar until creamy. Add 1 cup sourdough discard, 2 large eggs, and 1 teaspoon vanilla extract, mixing until smooth.
- Mix Dry Ingredients: Whisk 2 cups flour, 1/2 teaspoon baking soda, 1/2 teaspoon baking powder, and 1/2 teaspoon salt in a separate bowl.
- Combine Mixtures: Fold dry into wet ingredients until just combined, being careful not to overmix.
- Fold in Add-Ins: Gently fold in 1 cup semi-sweet chocolate chunks, 1 cup mini marshmallows, and 1/2 cup chopped graham crackers until evenly distributed.
- Chill Dough (Optional): Cover dough and refrigerate for 30-60 minutes for thicker cookies.
- Preheat Oven: Preheat to 350°F (175°C) and line baking sheets with parchment paper.
- Scoop & Bake: Scoop tablespoons of dough onto sheets, spacing 2 inches apart. Bake for 12-14 minutes until edges are golden and centers are soft.
- Cool: Let cookies cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely.

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