Dessert

S’mores Cookie Bars Recipe

ByGabriel Langdon November 19, 2025November 19, 2025

Introduction

These S’mores Cookie Bars combine the nostalgic flavors of classic s’mores with the convenience of a cookie bar. With layers of graham crackers, chocolate, and marshmallows, they offer a gooey, crunchy treat that’s perfect for any occasion.

The image shows a batch of square-cut cookie bars arranged closely together on a sheet of parchment paper. The top layer is golden-brown, crispy, and crackly with chunks of melted chocolate chips peeking through. Underneath, a gooey white layer of toasted marshmallows is visible, soft and slightly melted, creating a contrast with the crisp cookie layer. The texture looks chewy and rich, with some pieces slightly lifted to show the layers inside. On the right side, a black spatula rests on the parchment. The background is a white marbled texture, making the colors of the bars stand out vividly. photo taken with an iphone --ar 4:5 --v 7

Ingredients

7-8 full rectangles graham crackers
1 cup (2 sticks) unsalted butter, room temperature
3/4 cup granulated sugar
3/4 cup light brown sugar, packed
2 large eggs
2 tsp vanilla extract
3 cups all-purpose flour
3/4 tsp salt
3/4 tsp baking soda
1/2 cup semi-sweet chocolate chips
1 cup mini marshmallows
2 regular-sized (1.55oz) Hershey’s milk chocolate bars, broken into squares

Instructions

Step 1: Preheat your oven to 375°F. Line a 13×9-inch baking pan with parchment paper, leaving an overhang on the sides to help with removal later.
Step 2: Arrange the graham crackers in a snug layer at the bottom of the pan, breaking pieces as needed to cover fully without gaps.
Step 3: In a mixer, cream the butter, granulated sugar, and brown sugar together until light and fluffy. Add in the eggs and vanilla extract, mixing until combined.
Step 4: In a separate bowl, whisk together the all-purpose flour, salt, and baking soda. Gradually add the dry ingredients to the butter mixture, mixing until just combined.
Step 5: Gently stir in the semi-sweet chocolate chips and mini marshmallows, being careful not to overmix.
Step 6: Spread the cookie dough evenly over the graham cracker layer in the pan, pressing down lightly to create a smooth, uniform layer.
Step 7: Bake for 25-30 minutes or until the top is golden brown. If the top starts to brown too quickly, cover loosely with foil to prevent burning.
Step 8: Immediately after removing from the oven, sprinkle the broken milk chocolate squares evenly over the top. Let the heat melt the chocolate slightly.
Step 9: Allow the bars to cool for 20-30 minutes before lifting them out using the parchment overhang. Cut into squares and serve.

Tips & Variations

For extra gooeyness, try folding extra mini marshmallows into the dough before baking.
Use dark or white chocolate pieces instead of milk chocolate for different flavor profiles.
If you prefer a crunchier base, bake the graham cracker layer alone for 5 minutes before adding the cookie dough.

Storage

Store these cookie bars in an airtight container at room temperature for up to 3 days. The chocolate topping may remain soft, contributing to their chewy texture. For longer storage, refrigerate and reheat briefly in a warm oven or microwave to soften before serving.

How to Serve

A white square plate holds a batch of golden brown, square-cut s'mores bars. The bars have a rough cookie-like top layer dotted with melted chocolate chips. Beneath this top layer, you can see gooey, white melted marshmallows peeking out in uneven patches, creating a soft, sticky texture. The bars are arranged closely together with some slightly separated, showing their thick, layered structure. The setup is on a white marbled surface with a black-handled knife to the right. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use store-bought cookie dough instead of making it from scratch?

Yes, you can substitute with your favorite store-bought cookie dough, but be sure to include the chocolate chips and marshmallows for that classic s’mores flavor.