Dessert

S’mores Chocolate Chip Cookie Bars Recipe

ByMatteo Rossi December 2, 2025December 2, 2025

Introduction

These S’mores Chocolate Chip Cookie Bars combine all the best flavors of a classic campfire treat into one delicious dessert. With a graham cracker crust, layers of gooey marshmallow fluff, and plenty of chocolate chips, they’re perfect for sharing or enjoying as a sweet snack.

The image shows a close-up of two stacked dessert bars on a white marbled surface. Each bar has three clear layers: a crumbly golden-brown cookie crust on the bottom, a middle layer filled with dark chocolate chips and gooey dark chocolate chunks, and a top layer of white, puffy marshmallows with some browning and scattered chocolate chips. The texture of the bars looks soft and chewy with some crisp edges. More bars are blurred in the background with a soft white and neutral setting. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1 1/2 cups graham cracker crumbs*
1/2 cup unsalted butter, melted
1/2 cup unsalted butter, softened
1/2 cup brown sugar
1/2 cup white sugar
1 large egg
1/2 tsp baking soda
3/4 tsp salt
1 1/2 tsp vanilla extract
1 1/2 cups all purpose flour
1/2 cup graham cracker crumbs
1/2 cup milk chocolate chips
1/2 cup semi-sweet chocolate chips
1 (7oz) jar of marshmallow fluff (or marshmallow creme)**
Flaked sea salt (optional)

Instructions

Step 1: Preheat the oven to 350 degrees and line a 9×9-inch square baking pan with parchment paper or non-stick foil, or coat with baking spray. Set aside.
Step 2: Make the graham cracker crust by mixing 1 1/2 cups graham cracker crumbs with the melted butter. Press this mixture firmly into the bottom of the prepared pan. Set aside.
Step 3: In a mixing bowl, beat the softened butter until light and fluffy, about 1 minute. Add both brown sugar and white sugar, then cream together until light and fluffy, about another minute.
Step 4: Add the egg and mix until fully combined.
Step 5: Add baking soda, salt, and vanilla extract, mixing until well incorporated.
Step 6: Stir in 1/2 cup graham cracker crumbs and the all purpose flour, mixing just until combined.
Step 7: Fold in both milk chocolate chips and semi-sweet chocolate chips evenly into the dough.
Step 8: Divide cookie dough in half. Press half of it evenly over the graham cracker crust in the pan.
Step 9: Using two spoons, dollop marshmallow fluff over the cookie dough layer. Spread it gently into an even layer (dipping the spoons in warm water helps prevent sticking).
Step 10: Spread the remaining cookie dough over the marshmallow layer by pressing small flattened pieces with your hands. It’s okay if some fluff remains exposed.
Step 11: Bake for 25–30 minutes until bars are lightly golden and the center is set. If the edges brown too fast, tent foil over the pan partway through baking.
Step 12: Sprinkle with flaked sea salt, if desired, and allow the bars to cool completely before cutting and serving.

Tips & Variations

Use warm water to dip your spoons when spreading marshmallow fluff to make the process easier and less sticky.
For a richer flavor, try using dark chocolate chips instead of semi-sweet.
You can add crushed graham crackers on top before baking for an extra crunchy texture.

Storage

Store the bars in an airtight container at room temperature or in the refrigerator for up to 4 days. Reheat gently in the microwave if you prefer them warm, but avoid overheating to keep the marshmallow from melting too much.

How to Serve

Nine square pieces of s'mores bars are placed on a white marbled texture, arranged in a 3x3 grid on a sheet of white parchment paper. Each bar has one layer, a golden brown baked cookie base with cracks showing soft melted white marshmallow swirls and scattered dark chocolate chips embedded on the surface. Around the squares, a few chocolate chips and broken pieces of graham crackers lie on the white marbled texture, adding texture and color contrast. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use regular marshmallows instead of marshmallow fluff?

While marshmallow fluff spreads easily, you can substitute mini marshmallows by sprinkling them over the first cookie layer. They will melt during baking but create a different texture.