These brown butter s’mores cookies bring together everything that makes the classic campfire dessert irresistible: crisp graham crackers, melting chocolate, and gooey toasted marshmallows. Instead of stacking those ingredients into a sandwich, however, they are folded into a soft, chewy cookie with golden edges and a rich, buttery center.

Browning the butter gives the cookies an extra layer of flavor that feels right at home with the toasted ingredients. Its warm, nutty notes deepen the sweetness of the marshmallows, complement the graham crackers, and make the chocolate taste even richer. The result is nostalgic without being overly familiar—a s’mores-inspired dessert that feels special enough for a gathering but relaxed enough for an ordinary weekend.

Why Brown Butter Makes These Cookies Better

Brown butter begins with ordinary butter, but a few minutes on the stove transform its flavor. As the butter cooks, its water evaporates and the milk solids toast, creating a deep golden color and a warm aroma reminiscent of toasted nuts and caramel.

That added flavor is especially effective in s’mores cookies. Traditional s’mores depend on ingredients that have been toasted over a fire, and brown butter brings some of that same roasted character to the dough. It also helps balance the sweetness of the chocolate and marshmallows, giving the finished cookies a more complex flavor.

The process moves quickly once the butter begins to brown, so watch it closely. Remove it from the heat as soon as the milk solids at the bottom of the pan are deeply golden and fragrant. Be sure to scrape all those browned bits into the mixing bowl—they contain much of the flavor.

Building the Perfect S’mores Cookie

A good s’mores cookie should include distinct bites of all three classic components. Rough pieces of graham cracker provide a little crunch, chopped chocolate creates soft pools throughout the cookie, and mini marshmallows become gooey and lightly toasted in the oven.

Semisweet chocolate keeps the cookies from becoming too sweet, but milk chocolate will produce a more traditional s’mores flavor. Chopped chocolate works particularly well because the irregular pieces melt differently throughout the dough. Some remain in small pockets, while others form generous streaks of chocolate.

The graham crackers should also be broken into irregular pieces rather than ground into crumbs. Fine crumbs tend to disappear into the dough, while larger pieces retain more of their crisp texture and make the s’mores flavor immediately recognizable.

Tips for Working with Marshmallows

Marshmallows are the most unpredictable ingredient in these cookies. When placed along the edges of the dough, they can melt onto the baking sheet and create sticky, caramelized patches. Keeping most of the marshmallows tucked inside the dough helps them soften without escaping.

For the prettiest cookies, fold only part of the marshmallows into the dough. Press the remainder into the tops during the final few minutes of baking. They will stay more visible and become lightly puffed and toasted rather than dissolving completely.

If a little marshmallow does escape, let the cookie cool on the baking sheet before attempting to move it. As the melted sugar cools, it will firm enough to lift from the parchment more easily.

Why the Dough Needs Time to Rest

Freshly browned butter is hot and completely liquid, so it needs time to cool before the dough is mixed. If it is still warm, it can melt the sugars too quickly and make the cookies spread excessively. Cooling it until it is no longer hot to the touch gives the dough a better texture from the start.

Once mixed, the dough also benefits from a short chill. This allows the flour to hydrate, keeps the cookies thick, and gives the brown butter flavor time to settle into the dough. Forty-five minutes is usually enough, although the dough can be refrigerated overnight for a convenient make-ahead option.

Recipe: Brown Butter S’mores Cookies

Makes 16–18 large cookies

Ingredients

• 1 cup (2 sticks) unsalted butter
• 2¼ cups all-purpose flour
• 1 teaspoon baking soda
• ¾ teaspoon kosher salt
• 1 cup packed light brown sugar
• ⅓ cup granulated sugar
• 1 large egg
• 1 large egg yolk
• 2 teaspoons vanilla extract
• 6 ounces semisweet or milk chocolate, roughly chopped
• 4 full graham cracker sheets, broken into small pieces
• 1 cup mini marshmallows, divided
• Flaky salt, for finishing (optional)

Instructions

1. Melt the butter in a light-colored saucepan over medium heat. Cook, stirring often, until golden brown and nutty, 5–7 minutes. Pour into a large bowl and cool for 15 minutes.
2. Whisk together the flour, baking soda, and salt.
3. Whisk both sugars into the cooled butter. Add the egg, yolk, and vanilla.
4. Fold in the dry ingredients, followed by the chocolate, graham crackers, and ⅔ cup marshmallows.
5. Cover and chill for 45 minutes.
6. Heat the oven to 350°F. Line two baking sheets with parchment.
7. Scoop the dough into 3-tablespoon portions, enclosing exposed marshmallows. Space 3 inches apart.
8. Bake for 8 minutes. Press the remaining marshmallows and extra chocolate or graham pieces into the tops.
9. Bake 2–4 minutes more, until the edges are golden and the centers look slightly underdone.
10. Sprinkle with flaky salt. Cool on the pans for 10 minutes, then transfer to a rack.

How to Tell When the Cookies Are Done

The cookies are ready when their edges are set and lightly golden, but their centers still look soft. They may appear slightly underbaked when they first come out of the oven, which is exactly what you want. Residual heat from the baking sheet will continue cooking the centers as the cookies rest.

Waiting until the centers look completely firm can produce dry, cakey cookies once they cool. For soft, chewy results, rely on the color of the edges rather than the appearance of the middle. Allowing the cookies to rest on the pan for a full 10 minutes also helps them set without losing that tender texture.

Easy Variations

Milk chocolate is the closest match for a traditional campfire s’more and makes these cookies particularly rich and nostalgic. For a less-sweet version, use semisweet or dark chocolate. You can also combine two varieties to create a more layered chocolate flavor.

A small pinch of cinnamon added to the flour will emphasize the warm flavor of the graham crackers without making the cookies taste distinctly spiced. For even more texture, replace some of the chopped chocolate with chocolate-covered toffee pieces or add a handful of toasted pecans.

The cookies can also be made smaller for parties or cookie trays. Use about 1½ tablespoons of dough per cookie and begin checking them after 7 minutes. Add the marshmallow toppings during the final 2 minutes so they have time to soften without melting away.

Make-Ahead and Storage Tips

The dough can be prepared and refrigerated, tightly covered, for up to three days. If it becomes too firm to scoop, let it stand at room temperature for about 15 minutes. For easier make-ahead preparation, portion the dough before refrigerating it.

To freeze, arrange the portioned dough on a parchment-lined tray and freeze until solid. Transfer the dough balls to an airtight freezer container and keep them frozen for up to three months. Bake directly from frozen, adding approximately 2 minutes to the baking time. Wait to add the extra marshmallows until the cookies are nearly finished.

Store baked cookies in an airtight container at room temperature for up to four days. They are especially good warmed in the microwave for about 8 seconds, just long enough to soften the chocolate and make the marshmallows gooey again.

A Campfire Favorite in Cookie Form

Brown butter s’mores cookies capture the most satisfying parts of making s’mores—the toasted sweetness, melting chocolate, and contrasting textures—without waiting for a summer evening or building a fire. The brown butter makes them taste richer than the classic treat, while the graham crackers and marshmallows keep them playful and familiar.

Serve the cookies while they are still slightly warm, when the chocolate is soft and the marshmallows stretch with every bite. Whether they are made for a summer cookout, an autumn gathering, or a quiet night at home, they offer all the comfort of a freshly toasted s’more in a cookie that can be enjoyed any time of year.