
There’s something utterly magical about s’mores that brings back childhood memories of campfires, laughter, and starry nights. The combination of gooey marshmallows, rich chocolate, and crunchy graham crackers is simply irresistible. Today, I’m excited to share my easy recipe for S’mores Cookie Bars that will transport you straight back to those sweet summer nights, minus the campfire! These bars are not only quick to make but also a delightful treat that everyone will love.
Why You’ll Love S’mores Cookie Bars
- Fast: You can have the main components prepped and in the oven in about 20 minutes.
- Easy: It’s a simple “brown and bake” method that even beginner cooks can master.
- Giftable: This is a sturdy dish that travels well, making it perfect for potlucks or as a “get well soon” meal.
- Crowd-pleasing: Even people who think they don’t like s’mores usually fall in love with this cookie bar version!
Ingredients
- 1 cup unsalted butter, softened: This is the base that makes everything rich and buttery.
- 1 cup brown sugar, packed: Adds moisture and that lovely caramel flavor.
- 1/2 cup granulated sugar: For a touch of sweetness and contrast in texture.
- 1 large egg: Binds everything together beautifully.
- 1 teaspoon vanilla extract: For that warm, inviting flavor.
- 2 1/2 cups all-purpose flour: The foundation of our cookie bars.
- 1 teaspoon baking soda: Helps them rise and become fluffy.
- 1/2 teaspoon salt: Balances the sweetness perfectly.
- 1 cup chocolate chips: Because who can resist chocolate?
- 1 cup mini marshmallows: These give that classic s’mores taste.
- 1 cup graham cracker crumbs: The secret ingredient for that signature crunch.
- Additional chocolate chips and marshmallows for topping: More is always better when it comes to s’mores!
How to Make S’mores Cookie Bars
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
- In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth and fluffy.
- Beat in the egg and vanilla extract until everything is well combined.
- In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add this dry mixture to the wet ingredients, mixing until just combined.
- Fold in the chocolate chips, mini marshmallows, and graham cracker crumbs until they’re evenly distributed throughout the dough.
- Spread half of the cookie dough mixture evenly in the prepared baking pan. Press it down gently to form a solid base layer.
- Sprinkle additional chocolate chips and mini marshmallows over the dough base for that extra s’mores magic.
- Drop spoonfuls of the remaining cookie dough over the chocolate and marshmallows, spreading it as evenly as possible.
- Bake in the preheated oven for 25-30 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean.
- Allow the bars to cool in the pan before cutting into squares. Enjoy your S’mores Cookie Bars!
Substitutions & Additions
If you’re looking to switch things up a bit, here are some fun ideas:
- Use dark chocolate chips or even white chocolate for a different flavor profile.
- Try adding nuts like chopped pecans or walnuts for an extra crunch.
- For a more decadent treat, drizzle some melted chocolate over the top before serving.
Tips for Success
To ensure your S’mores Cookie Bars come out perfectly, keep these tips in mind:
- Don’t overmix your dough once you add the flour; this keeps the bars tender.
- Make sure your butter is softened but not melted for the best texture.
- If you want to prep ahead, you can make the dough a day in advance and refrigerate it until you’re ready to bake.
How to Store S’mores Cookie Bars
Once your bars have cooled, store them in an airtight container at room temperature for up to 5 days. If you want to keep them longer, feel free to freeze them! Just wrap individual squares in plastic wrap and place them in a freezer-safe bag. They will last up to three months in the freezer!
FAQs
Can I make these cookie bars gluten-free? Yes! Simply use a gluten-free all-purpose flour blend in place of regular flour.
What can I use instead of mini marshmallows? You can chop regular marshmallows into smaller pieces if you don’t have mini ones on hand.
Can I add more chocolate? Absolutely! Feel free to add more chocolate chips or even chunks of your favorite chocolate bars.
For more delicious recipes, check out easy dessert ideas or homemade treats you will love!
If you’re a fan of all things sweet, make sure to follow my Pinterest for more delightful recipes and inspiration!

S'mores Cookie Bars
Equipment
- 9x13-inch baking pan
- Large bowl
- Separate bowl
- Whisk
Ingredients
For the Cookie Bars
- 1 cup unsalted butter softened
- 1 cup brown sugar packed
- 1/2 cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 1/2 cups all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1 cup chocolate chips
- 1 cup mini marshmallows
- 1 cup graham cracker crumbs
Additional toppings
- chocolate chips
- mini marshmallows
Instructions
- Step 1: Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan or line it with parchment paper.
- Step 2: In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth.
- Step 3: Beat in the egg and vanilla extract until well combined.
- Step 4: In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
- Step 5: Fold in the chocolate chips, mini marshmallows, and graham cracker crumbs until evenly distributed throughout the dough.
- Step 6: Spread half of the cookie dough mixture evenly in the prepared baking pan. Press it down gently to form a base layer.
- Step 7: Sprinkle additional chocolate chips and mini marshmallows over the dough base.
- Step 8: Drop spoonfuls of the remaining cookie dough over the chocolate and marshmallows, spreading it as evenly as possible.
- Step 9: Bake in the preheated oven for 25-30 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean.
- Step 10: Allow the bars to cool in the pan before cutting into squares. Enjoy your S'mores Cookie Bars!