Name: Cookie S'mores Bars
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 1 cup unsalted butter, softened; 3/4 cup brown sugar; 1/2 cup granulated sugar; 2 large eggs; 2 teaspoons vanilla extract; 2 1/2 cups all-purpose flour; 1 teaspoon baking soda; 1/2 teaspoon salt; 1 1/2 cups graham cracker crumbs; 1 1/2 cups semi-sweet chocolate chips; 2 cups mini marshmallows; 6 full graham crackers, broken into pieces; 1 milk chocolate bar, broken into squares

Cookie S’mores Bars are the kind of dessert that disappears fast. They bring together everything people love about classic s’mores, but in a soft, sliceable bar that is much easier to bake for a crowd. You get buttery cookie dough, gooey marshmallows, melty chocolate, and that familiar graham cracker flavor in every bite.

They are perfect for potlucks, birthday tables, weekend baking, or any moment when you want a dessert that feels nostalgic and a little extra special. Instead of standing around a campfire, you can pull one pan from the oven and enjoy the same cozy flavor with golden edges and a soft center.

What makes Cookie S’mores Bars stand out is the mix of textures. The cookie base stays rich and chewy, the graham crackers add a subtle crunch, the chocolate melts into every layer, and the marshmallows create that classic toasted sweetness. It is a simple dessert, but every layer works together.

Another reason they are such a favorite is how easy they are to make ahead. They travel well, slice neatly once cooled, and feel homemade in the best way. Whether you serve them warm with extra chocolate still soft or let them cool completely for cleaner bars, they always bring that comforting s’mores flavor.

1 cup unsalted butter, softened
3/4 cup brown sugar
1/2 cup granulated sugar
2 large eggs
2 teaspoons vanilla extract
2 1/2 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1 1/2 cups graham cracker crumbs
1 1/2 cups semi-sweet chocolate chips
2 cups mini marshmallows
6 full graham crackers, broken into pieces
1 milk chocolate bar, broken into squares

Step 1: Prepare the Pan and Oven

Preheat your oven to 350°F. Line a 9×13-inch baking pan with parchment paper or lightly grease it so the bars lift out easily after baking.

Step 2: Cream the Butter and Sugars

In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar until the mixture looks light and creamy. This helps create a soft, chewy bar.

Step 3: Add the Eggs and Vanilla

Mix in the eggs one at a time, then stir in the vanilla extract. Scrape down the bowl so everything blends evenly.

Step 4: Combine the Dry Ingredients

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

Step 5: Fold in the Chocolate

Stir in the chocolate chips, saving a small handful for the top if you want a prettier finish.

Step 6: Build the First Layer

Press about two-thirds of the cookie dough evenly into the prepared pan. The dough may be thick, so lightly dampened fingers or the back of a spoon can help spread it out.

Step 7: Add the S’mores Filling

Scatter the mini marshmallows over the dough. Add the graham cracker pieces and tuck the milk chocolate squares across the top so every section gets some gooey chocolate.

Step 8: Finish with the Remaining Dough

Drop small spoonfuls of the remaining dough over the filling. It does not need to cover every bit of marshmallow. Leaving a few spots exposed gives the bars that rustic look.

Step 9: Bake Until Golden

Bake for 25 to 30 minutes, or until the top is lightly golden and the edges are set. The center may still look slightly soft, which is perfect.

Step 10: Cool and Slice

Let the bars cool in the pan long enough to set before slicing. For cleaner squares, cool completely. For an extra gooey dessert, serve them slightly warm.

These bars are wonderful on their own, but they are even more fun slightly warm with a glass of milk or a scoop of vanilla ice cream. For parties, cut them into small squares because they are rich and satisfying. If you want a bakery-style finish, add a few extra chocolate chips on top while the bars are still warm.

Store Cookie S’mores Bars in an airtight container at room temperature for up to 3 days. If your kitchen is warm, you can refrigerate them for up to 5 days and let them sit out a bit before serving. They also freeze well. Wrap individual bars and freeze for up to 2 months.

Frequently Asked Questions

Can I use regular marshmallows instead of mini marshmallows?

Yes. Just cut large marshmallows into smaller pieces so they distribute more evenly through the bars.

Do I need to chill the dough?

No. This dough is designed to be baked right away, which makes the recipe easy and convenient.

Why do my bars look soft in the center?

That is normal. The center continues to set as the bars cool, and that soft texture keeps them chewy.

Can I use milk chocolate chips instead of semi-sweet?

Absolutely. Milk chocolate will give the bars a sweeter, more classic s’mores flavor.

How do I keep the marshmallows from overbrowning?

Make sure they are mostly tucked under bits of dough and keep an eye on the bars near the end of baking.

Can I make these for a party ahead of time?

Yes. Bake them a day ahead, cool completely, and store them covered. They taste great the next day.

If you love Cookie S’mores Bars, you might also enjoy a few more sweet bakes from Nina Dishes:

Christmas Maraschino Cherry Shortbread Cookies for a buttery cookie with festive color.
Bisquick Chocolate Chip Cookies when you want something quick and classic.
3 Ingredient Oatmeal Breakfast Cookies for an easy cookie-style treat with a simple pantry list.
Healthy Cookies Recipe if you want a lighter option to keep on hand.
Lemon Sugar Cookies when you are craving something bright and soft.

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

When you bake these Cookie S’mores Bars, I would love to hear how they turned out. Did you add extra chocolate on top? Did you use dark chocolate, milk chocolate, or a mix of both? Little changes can make each batch feel different.

You can also find more daily recipe inspiration on Nina Dishes Pinterest. It is a great place to save fresh ideas for cookies, bars, casseroles, dinners, and simple desserts for any day of the week.

Cookie S’mores Bars

Author: Nina Klatten
Total Time: 45 minutes
Yield: 16 bars
Diet: Vegetarian

Print Recipe

Description

Cookie S’mores Bars are a rich, chewy dessert layered with buttery cookie dough, graham cracker crumbs, melted chocolate, and gooey marshmallows for an easy baked treat that brings all the cozy flavor of classic campfire s’mores into one simple pan.