Gooey S’mores Cookie Bars with Graham Cracker Crust Recipe

When it comes to comforting desserts, few treats rival the nostalgic flavor of s’mores. This recipe for gooey s’mores cookie bars with graham cracker crust takes that classic campfire snack to the next level by transforming it into a thick, chewy dessert bar that’s perfect for sharing. Whether you’re craving a cozy treat or planning a crowd-pleasing dessert, these bars hit the spot every time.

this Recipe

You’ll find the combination of a buttery graham cracker crust, rich chocolate chunks, and gooey marshmallows utterly irresistible. Plus, these smores cookie bars are simple to whip up, making them an ideal choice for both beginner bakers and seasoned pros alike.

Why You’ll Love This Recipe

• Easy to make with simple ingredients you likely have on hand.
• Perfectly gooey and chewy texture that melts in your mouth.
• Fun twist on classic s’mores—no campfire needed.
• Great for sharing at parties, picnics, or family gatherings.
• Customizable with your favorite chocolate or marshmallow types.

Ingredients

Gather these ingredients to create your gooey s’mores cookie bars with a crisp graham cracker crust.

• 1 1/2 cups graham cracker crumbs (about 10 full sheets)
• 6 tablespoons unsalted butter, melted
• 1/4 cup granulated sugar
• 1 1/4 cups all-purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup unsalted butter, softened
• 3/4 cup packed brown sugar
• 1 large egg
• 1 teaspoon pure vanilla extract
• 1 cup semisweet chocolate chunks
• 1 1/2 cups mini marshmallows

Recipe Details

• Prep Time: 20 minutes
• Cook Time: 25 minutes
• Total Time: 45 minutes
• Servings: 12 bars
• Calories (approx.): 320 per bar

How to Make Gooey S’mores Cookie Bars with Graham Cracker Crust

1. Preheat your oven to 350°F and line a 9×9-inch baking pan with parchment paper for easy removal.
2. In a medium bowl, combine the graham cracker crumbs, melted butter, and granulated sugar. Press this mixture firmly into the bottom of the prepared pan to form an even crust layer.
3. In a separate large bowl, whisk together the flour, baking soda, and salt.
4. Using a hand mixer or stand mixer, cream the softened butter with brown sugar until light and fluffy. Beat in the egg and vanilla extract until smooth.
5. Gradually add the dry ingredients to the wet mixture, mixing until just combined. Fold in the chocolate chunks gently for pockets of melty chocolate.
6. Spread the cookie dough evenly over the graham cracker crust in the pan, smoothing the top with a spatula.
7. Sprinkle the mini marshmallows evenly over the top of the dough layer, pressing them down slightly so they stick during baking.
8. Bake for 22 to 25 minutes or until the edges are golden and the marshmallows are toasted and bubbly. The center may look slightly soft but will firm up as it cools.
9. Allow the bars to cool completely in the pan on a wire rack before cutting into 12 squares and serving.

Tips for the Best Results

• Use fresh mini marshmallows for that perfect gooey top layer that melts beautifully.
• For extra crunch, add chopped nuts like pecans or walnuts to the cookie dough.
• Don’t overbake; bars should be slightly soft in the center to maintain gooeyness.
• Press the graham cracker crust firmly to avoid a crumbly base.
• Allow bars to cool fully before slicing to keep clean edges and avoid crumbling.

Storage and Reheating

Store any leftover gooey s’mores cookie bars in an airtight container at room temperature for up to 3 days or in the refrigerator for up to one week. If you want to enjoy them warm, microwave a single bar for about 15 seconds to revive the gooey texture.

You can also freeze the bars for up to 2 months by wrapping them tightly in plastic wrap and placing them in a freezer-safe container. Thaw overnight in the fridge before reheating gently.

Frequently Asked Questions

Can I use different types of chocolate in this recipe?

Absolutely! Feel free to substitute semisweet chocolate chunks with milk chocolate, dark chocolate, or even white chocolate chips for a different flavor profile. Mixing chocolates can also be delicious.

What can I use if I don’t have graham crackers?

If you don’t have graham crackers, digestive biscuits or honey graham cereal crushed finely can serve as a good substitute for the crust. Just ensure the texture is similar to hold the crust firmly.

Can I make these bars ahead of time?

Yes, these bars can be made a day in advance and stored in an airtight container. They actually taste great after resting as the flavors meld together. Just bring them to room temperature before serving.

Are mini marshmallows necessary?

Mini marshmallows give the signature gooey top that’s classic to s’mores. If you only have large marshmallows, you can cut them into smaller pieces to achieve a similar effect.