Name: S'mores Cookie Bars
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 1 cup unsalted butter, softened; 1 cup brown sugar, packed; 1/2 cup granulated sugar; 2 large eggs; 2 teaspoons vanilla extract; 2 1/2 cups all-purpose flour; 1 1/2 cups graham cracker crumbs (about 10 crackers); 1 teaspoon baking soda; 1/2 teaspoon salt; 2 cups milk chocolate chips or chopped chocolate bars; 2 cups mini marshmallows

S’mores Cookie Bars are like summer campfires wrapped in a gooey, golden, chocolatey hug. These bars capture everything you love about classic s’mores—toasty marshmallows, melty chocolate, and that signature graham cracker crunch—but in a chewy cookie form you can bake indoors any time of year. Whether you’re hosting a casual get-together or just need a cozy treat, these cookie bars deliver nostalgia and indulgence in every bite.

The base is a brown sugar cookie dough loaded with graham cracker crumbs, layered with rich milk chocolate and mini marshmallows, then baked to golden perfection. As they cool, the marshmallows become irresistibly gooey, making every slice a slice of campfire magic. They’re perfect for parties, bake sales, or just an afternoon pick-me-up.

What Kind of Graham Crackers Work Best?

Classic honey graham crackers are the go-to for this recipe. They provide the perfect sweet, nutty base that complements the richness of the chocolate and marshmallows. You can also experiment with cinnamon grahams for a spiced twist or gluten-free grahams if needed.

1 cup unsalted butter, softened
1 cup brown sugar, packed
1/2 cup granulated sugar
2 large eggs
2 tsp vanilla extract
2 1/2 cups all-purpose flour
1 1/2 cups graham cracker crumbs (about 10 crackers)
1 tsp baking soda
1/2 tsp salt
2 cups milk chocolate chips or chopped chocolate bars
2 cups mini marshmallows

Step 1: Make the Dough

Preheat your oven to 350°F (175°C). Cream together the butter, brown sugar, and granulated sugar until light and fluffy. Beat in the eggs one at a time, then mix in the vanilla extract.

Step 2: Add Dry Ingredients

In a separate bowl, whisk together flour, graham cracker crumbs, baking soda, and salt. Gradually add the dry mix to the wet ingredients until a soft dough forms.

Step 3: Layer It Up

Press half the dough evenly into a greased 9×13-inch baking pan. Sprinkle the chocolate evenly over the dough, followed by a generous layer of mini marshmallows.

Step 4: Top and Bake

Drop spoonfuls of the remaining dough over the top, spreading it gently. It’s okay if some marshmallows peek through. Bake for 25–30 minutes until golden and set.

Step 5: Cool and Slice

Allow to cool in the pan for at least 20 minutes before slicing into bars. Serve warm for gooey goodness or let cool completely for cleaner cuts.

These bars are delicious served slightly warm, when the chocolate is still melty and the marshmallows are soft. Pair with a glass of milk or scoop of vanilla ice cream for an extra-decadent treat.

To store, keep them in an airtight container at room temperature for up to 4 days. For longer storage, freeze in layers separated by parchment for up to 2 months.

Frequently Asked Questions

Can I use marshmallow fluff instead of mini marshmallows?

Fluff can work, but mini marshmallows provide better texture and structure during baking.

What type of chocolate is best?

Milk chocolate gives that classic s’mores taste, but feel free to use semi-sweet or dark chocolate if you prefer a richer flavor.

Can I make these gluten-free?

Yes! Use gluten-free graham crackers and a 1:1 gluten-free flour blend.

Should I refrigerate the dough?

No need! The dough is soft enough to spread right after mixing, but if your kitchen is hot, chilling for 10 minutes helps.

Can I double the recipe?

Absolutely. Use a larger pan or two 9×13 pans and adjust baking time slightly.

Do these travel well?

Yes, they’re sturdy once cooled and perfect for picnics, potlucks, or lunchboxes.

If you love these S’mores Cookie Bars, check out these other dreamy bakes:

Irresistible Pecan Pie Bites for bite-sized holiday magic.
Sopapilla Cheesecake Bars with a cinnamon-sugar crunch and creamy filling.
Peanut Butter Balls with Chocolate Rice Krispies for no-bake peanut-chocolate bliss.
Cinnamon Donut Bread Recipe that tastes like a fairground treat in loaf form.
3-Ingredient Oatmeal Breakfast Cookies when you’re craving a healthier cookie fix.

📌 Save this recipe to your Pinterest dessert board so you can come back to it any time.

And let me know in the comments how yours turned out. Did you go classic or add peanut butter? Maybe a drizzle of caramel?

I love seeing your creative spins on these cookie bars. Feel free to ask questions or share your own tips—we’re baking buddies around here!

More ideas shared daily over on Pinterest @ Nina Dishes — see you there!

S’mores Cookie Bars

Author: Nina Klatten
Total Time: 45 minutes
Yield: 24 bars
Diet: Vegetarian

Print Recipe

Description

These S’mores Cookie Bars bring the cozy charm of campfire s’mores indoors, layering a soft graham cracker cookie base with melty chocolate and gooey marshmallows. Perfect for parties, gifting, or when you just want that nostalgic, toasted treat any time of year.