Bite into my Sourdough S’mores Cookies with Marshmallows and Brown Butter, and you’ll experience a delightful dance of flavors that’s chewy, nutty, sweet, and utterly irresistible! These cookies combine the tangy depth of sourdough with gooey marshmallows and rich chocolate, all enhanced by the warm, nutty aroma of brown butter. I created this recipe during a busy week when I wanted to sneak in some extra protein into our dessert—each cookie packs around 180 calories, making it a satisfying treat without the guilt.
I can still picture the first time I made these cookies for my family on a chilly Sunday afternoon. As they filled the kitchen with their enticing aroma, my youngest exclaimed, “Mom, are you baking s’mores?!” It was the addition of brown butter that set these cookies apart from regular versions, providing a unique twist that had everyone curious. After the first bite, my teenagers were asking for seconds, and I couldn’t help but smile at their delighted faces as they savored every crumb.
Ingredients for the Sourdough S’mores Cookies with Marshmallows and Brown Butter
Each ingredient in this dish plays an essential role in flavor and texture. Here’s what you’ll need:
1 cup all-purpose flour: Provides the structure for a chewy cookie base.
1 cup sourdough starter (active and bubbly): Contributes a tangy depth of flavor and moisture.
1 teaspoon baking soda: Helps the cookies rise, creating a soft texture.
1 teaspoon salt: Enhances all the flavors while balancing sweetness.
1 stick unsalted butter (brown butter): Adds a rich, nutty flavor that deepens the overall taste.
1 cup brown sugar (packed): Gives sweetness and a hint of caramel notes to each bite.
1 large egg: Binds the ingredients together for a cohesive dough.
1 teaspoon vanilla extract: Infuses warmth and enhances the sweetness of the cookies.
1 cup chocolate chips (semi-sweet): Offers rich pockets of melted chocolate for indulgence.
1 cup mini marshmallows: Adds gooey sweetness, reminiscent of traditional s’mores.
Step-by-Step Instructions
I recommend starting with the brown butter because it adds a rich, nutty flavor to your cookies and needs time to cool before you mix it with other ingredients.
Step 1: In a saucepan, melt the stick of unsalted butter over medium heat. Keep an eye on it as it heats up; you’ll want to stir occasionally until it turns a beautiful golden brown and gives off a nutty aroma, which should take about 5 minutes. This step builds serious flavor, so don’t rush it! Once it’s browned, remove it from the heat and let it cool slightly before transferring it to a mixing bowl.
Step 2: Add the packed brown sugar, large egg, and vanilla extract to the bowl with the cooled brown butter. Whisk everything together until well combined; you’ll want a nice smooth mixture that’s creamy and glossy. This is where your cookies start to take shape, so make sure all the ingredients meld together nicely for that perfect chewy texture.
Step 3: In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. This step is crucial for evenly distributing the leavening agent throughout your cookie dough. Take your time here; I usually find that giving the dry ingredients a good whisk helps avoid any lumps later on when you combine everything.
Step 4: Gradually add the dry mixture to the wet ingredients in your mixing bowl. Mix until just combined; be careful not to overmix, as this can result in tough cookies. I like to use a spatula for this part since it allows me to gently fold without ruining that tender texture we’re aiming for.
Step 5: Now it’s time for the fun part! Fold in the semi-sweet chocolate chips and mini marshmallows until they’re evenly distributed throughout your dough. The marshmallows will add such a delightful gooeyness when baked! I suggest using about 1 cup of each mix-in for that perfect s’mores flavor balance—you’ll want every bite bursting with chocolatey goodness.
Step 6: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper for easy cleanup. Once heated, scoop tablespoon-sized portions of dough onto the prepared baking sheet, making sure they’re spaced about 2 inches apart; this will allow them room to spread without merging into one giant cookie. I usually fit about 12 cookies per standard baking sheet.
Step 7: Bake for 10-12 minutes or until you see the edges turning golden brown while the centers look set but still soft—this is key for that chewy texture! I recommend checking them around the 10-minute mark since ovens can vary a bit—no one likes overbaked cookies!
Step 8: Let your freshly baked cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack. This cooling step is essential as it allows them to firm up just enough while still being warm and deliciously melty from those chocolate chips and marshmallows. Enjoy every gooey bite!
What to Serve with Sourdough S’mores Cookies with Marshmallows and Brown Butter
This dish is already incredibly filling and balanced, but these sides add extra variety and nutrition to round out your meal perfectly.
Fresh Berry Salad: A medley of mixed greens topped with fresh strawberries, blueberries, and a light balsamic vinaigrette brings a refreshing contrast to the rich flavors of the cookies. The acidity of the berries enhances the sweetness while providing a boost of vitamins C and K. My kids love how vibrant this salad looks on the table, making it a staple at our family gatherings.
Coconut Rice: Creamy coconut rice cooked with a hint of lime offers a delightful tropical twist that pairs beautifully with the marshmallow and chocolate notes in the cookies. This side adds about 4 grams of protein per serving, along with healthy fats from coconut milk that help keep everyone satisfied. We often prepare this as a special treat when we’re craving something sweet yet savory.
Guacamole with Tortilla Chips: Smooth guacamole made from ripe avocados, lime juice, and cilantro serves as a perfect dip alongside crunchy tortilla chips. The creaminess of the avocado complements the chewy texture of the cookies while introducing healthy fats that promote heart health. My family loves munching on this during movie nights, balancing indulgence with nutritious goodness.
Honey Cinnamon Roasted Sweet Potatoes: Cubed sweet potatoes roasted in honey and cinnamon create a sweet yet savory side that echoes the dessert-like quality of the cookies. They provide complex carbohydrates for sustained energy and about 2 grams of protein per serving, making them perfect for fueling after-school activities. I often whip these up when we want something comforting but still want to keep things on the healthier side.
Storage & Serving Tips
To store your Sourdough S’mores Cookies, place them in an airtight container at room temperature for up to 5 days. If you prefer to keep them fresher for longer, you can refrigerate them, but they may lose some of their chewy texture. For optimal storage, consider keeping the chocolate chips and mini marshmallows separate from the cookies if you’re planning to eat them over several days; this will help maintain their texture and prevent any sogginess. Store the cookies in one container and the mix-ins in small individual containers.
When it comes to reheating, the best method is to pop the cookies into a preheated oven at 350°F for about 5-7 minutes, which will revive their soft and chewy texture. Avoid microwaving as it makes the cookies disappointingly soft rather than warm and gooey. If you have extra chocolate chips or marshmallows stored separately, add those just before reheating so they melt perfectly without losing their integrity during storage.
Pro tip: To batch cook these delicious cookies for meal prep, consider doubling the recipe on a Sunday and portioning them into individual containers for the week ahead. This way, family members can self-assemble their own treats by adding fresh mini marshmallows or extra chocolate chips as desired. For variety, swap out semi-sweet chocolate chips with dark chocolate or even white chocolate to change up flavors throughout the week. To keep your cookies at their best during meal prep storage, remember to store any additional mix-ins like chocolate chips separately until ready to enjoy!
Conclusion
These Sourdough S’mores Cookies with Marshmallows and Brown Butter have become one of those recipes I make almost every week because they’re deliciously chewy and packed with 180 calories of pure joy. The unique tanginess from the sourdough starter sets these cookies apart from typical s’mores treats, making them a delightful twist on a classic favorite. Give this one a try this week, and I promise it’ll become a regular rotation treat in your house too.
Sourdough S'mores Cookies with Marshmallows and Brown Butter
Ingredients
Method
- In a saucepan, melt the butter over medium heat until it turns golden brown and has a nutty aroma, about 5 minutes. Remove from heat and let cool slightly.
- Transfer the brown butter to a mixing bowl.
- Add brown sugar, egg, and vanilla extract to the brown butter and whisk until combined.
- In a separate bowl, whisk together flour, baking soda, and salt.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
- Fold in chocolate chips and mini marshmallows.
- Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
- Scoop tablespoon-sized portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.
- Bake for 10-12 minutes, or until the edges are golden and the centers are set.
- Let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
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