Love classic campfire s’mores but want something easier to bake and share? These S’mores Cookie Bars combine gooey marshmallows, melted chocolate, and graham cracker flavor in one thick, chewy dessert bar — no campfire required!
Perfect for parties, bake sales, summer gatherings, or cozy nights at home.
Why You’ll Love These S’mores Cookie Bars
- 🍫 Gooey melted chocolate layers
- 🔥 Toasty marshmallow topping
- 🍪 Soft, chewy cookie base
- 🎉 Great for feeding a crowd
- ⏱ Easy to make in one pan
Ingredients You’ll Need
For the Cookie Base
- 1 cup unsalted butter, softened
- ¾ cup brown sugar
- ½ cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 2 cups all-purpose flour
- 1 cup crushed graham crackers
- 1 teaspoon baking soda
- ½ teaspoon salt
For the Topping
- 2 cups mini marshmallows
- 1 ½ cups milk chocolate chips or chocolate bars (broken into pieces)
- ½ cup extra graham cracker pieces
How to Make S’mores Cookie Bars
Step 1: Preheat Oven
Preheat oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper.
Step 2: Make the Cookie Dough
In a large bowl, cream butter, brown sugar, and granulated sugar until fluffy.
Add eggs and vanilla, mixing well.
Stir in flour, crushed graham crackers, baking soda, and salt until combined.
Step 3: Press the Base
Press about ¾ of the dough evenly into the prepared baking pan.
Step 4: Add Chocolate Layer
Sprinkle chocolate chips evenly over the cookie base.
Step 5: Add Marshmallows
Layer mini marshmallows over the chocolate.
Crumble remaining cookie dough over the top and sprinkle extra graham cracker pieces.
Step 6: Bake
Bake for 25–30 minutes until golden brown and marshmallows are lightly toasted.
Step 7: Cool & Slice
Allow bars to cool completely before slicing for clean cuts.
Pro Tips for Perfect Bars
- 🔥 For extra toasty marshmallows, broil for 1–2 minutes at the end (watch carefully).
- 🍫 Use chopped chocolate bars for gooier layers.
- ❄️ Chill before slicing for neater squares.
- 🧈 Don’t overbake — they continue setting as they cool.
Storage & Make-Ahead
- Store in an airtight container at room temperature for up to 3 days.
- Refrigerate for up to 5 days for firmer texture.
- Freeze up to 2 months (wrap tightly).
Delicious Variations
- Peanut Butter S’mores Bars: Add peanut butter chips.
- Dark Chocolate Version: Use dark chocolate chunks.
- Stuffed Version: Add a layer of marshmallow fluff inside the dough.
- Salted Caramel S’mores: Drizzle caramel and sprinkle sea salt.
Perfect For
- Summer BBQs
- Camp-themed parties
- Birthday celebrations
- Potlucks
- Holiday dessert trays
Final Thoughts
These S’mores Cookie Bars deliver all the nostalgic flavors of a campfire s’more in a simple, crowd-friendly dessert. Gooey, chocolatey, chewy, and slightly crisp on the edges — they’re guaranteed to disappear fast!