Smores cookie bars put graham cracker crumbs, chocolate chips, and mini marshmallows into a buttery cookie dough. The dough bakes in one pan, making it convenient for slicing and sharing. Brown sugar supplies a warm sweetness while the graham crumbs bring the familiar campfire-dessert flavor.
These smores cookie bars use a nine-by-thirteen-inch pan and make twelve large bars or twenty-four smaller pieces. The cooling time matters: hot marshmallow and melted chocolate are soft, so cutting straight from the oven can leave the center looking loose even when the cookie base has baked.
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Why This Recipe Works
Smores cookie bars work by distributing the graham crumbs through the dry ingredients, then folding chocolate and marshmallows into the finished dough. This makes them cookie bars with mix-ins rather than a separate graham-cracker sandwich stack.
Softened butter creams with both sugars before the eggs are added. Once flour enters the bowl, mix only until the dough is even. A small measured optional topping gives a visible finish without introducing an undefined handful that changes the pan’s balance.
Ingredients for Smores Cookie Bars
Use plain graham cracker crumbs, all-purpose flour, softened butter, and mini marshmallows. The main dough contains one cup each of chips and marshmallows. Optional extra topping is listed separately, so it does not replace those main quantities.
For smores cookie bars, line the pan with parchment after greasing it lightly. Leave enough overhang to lift the cooled slab. A glass or very dark pan may brown differently from a light metal pan, so use the center checks rather than relying on a single minute mark.
Base Ingredients
- 1 cup Unsalted butter, softened
- 1 cup Brown sugar, packed
- 1/2 cup Granulated sugar
- 2 Large eggs
- 1 teaspoon Vanilla extract
Dry Ingredients
- 2 1/2 cups All-purpose flour
- 1 teaspoon Baking soda
- 1/2 teaspoon Salt
- 1 cup Graham cracker crumbs
Mix-ins
- 1 cup Chocolate chips
- 1 cup Mini marshmallows
Optional topping
- 2 tablespoons chocolate chips (optional extra)
- 1/4 cup mini marshmallows (optional extra)
For the pan
- as needed butter or neutral oil (for greasing)
How to Make Smores Cookie Bars
Cream butter with brown and white sugar until lighter, then beat in eggs and vanilla. Combine flour, baking soda, salt, and graham crumbs in a separate bowl before adding them to the butter mixture. Fold the main chips and marshmallows in last.
Press smores cookie bars dough evenly into the pan, reaching the corners without packing it aggressively. Sprinkle the small optional topping over the surface. Bake until the edges are golden and the cookie center is set, checking the actual dough rather than a melted chocolate or marshmallow pocket. If the top colors early, protect it loosely while the center finishes.
How to Serve
Let smores cookie bars cool in the pan for around ninety minutes, or until the slab is set enough to lift and cut cleanly. Use the parchment ends to move it to a board, then cut twelve large squares. For a dessert platter, split each square into two smaller portions.
The tops can remain sticky because marshmallows soften and caramelize. Place parchment between stacked bars rather than pressing the surfaces together. Serve at room temperature for a clearer cookie texture, or warm an individual piece very briefly if you prefer softer chocolate.
Storage
Keep smores cookie bars in a covered container at cool room temperature for two to three days. Do not close the container while the slab is still steaming, because trapped moisture softens the edges.
Freeze wrapped portions for about one month with parchment separating them. Thaw covered to keep the surface from drying out. A long microwave reheat can make marshmallows expand and turn sticky, so heat only a single portion briefly if desired.
For uncooked cookie dough and flour precautions, see FDA guidance on handling flour safely.
Tips and Variations
For smores cookie bars, weigh or lightly spoon the flour if available rather than packing the cup. Too much flour makes the dough difficult to spread and can leave a dry base beneath the melted mix-ins.
Do not replace mini marshmallows with a full layer of large ones and assume the same bake. Larger pieces melt and brown differently. The optional topping is limited to the measured small quantity; extra marshmallows can hide the center and make doneness harder to judge.
Frequently Asked Questions
Are these individual cookies?
No. Smores cookie bars are baked as one slab, then cooled and sliced. The dough and graham crumbs belong in the pan rather than on individual cracker bases.
Do I need the extra topping?
No. The main dough already includes chocolate chips and mini marshmallows. The optional topping is for appearance and a little extra texture.
How do I test the middle?
Check smores cookie bars in a dough area away from a melted chip or marshmallow. The cookie base should be set; liquid raw dough means it needs more time.
Can I cut while warm?
Wait until the slab has cooled and set. Warm chocolate and marshmallow smear, and the cookie structure is more fragile immediately after baking.
What serving size is listed?
The card counts twelve large bars. Cut twenty-four smaller pieces for a shared dessert tray, but remember that the listed batch has not changed.
More Recipes to Try
- S’mores Cookies
- Decadent S’mores Cheesecake: A Sweet Twist on a Timeless Favorite
- Peanut Butter Marshmallow Creme Cookies
- Peanut Butter Cup Cookies
S’mores Cookie Bars
Ingredients
Base Ingredients
- 1 cup Unsalted butter, softened
- 1 cup Brown sugar, packed
- 1/2 cup Granulated sugar
- 2 Large eggs
- 1 teaspoon Vanilla extract
Dry Ingredients
- 2 1/2 cups All-purpose flour
- 1 teaspoon Baking soda
- 1/2 teaspoon Salt
- 1 cup Graham cracker crumbs
Mix-ins
- 1 cup Chocolate chips
- 1 cup Mini marshmallows
Optional topping
- 2 tablespoons chocolate chips optional extra
- 1/4 cup mini marshmallows optional extra
For the pan
- as needed butter or neutral oil for greasing
Instructions
- Preheat the oven to 350°F. Lightly grease a 9×13-inch baking pan and line with parchment, leaving handles at the sides.
- Cream softened butter, brown sugar, and white sugar. Add eggs one at a time, then beat in vanilla.
- Whisk flour, baking soda, salt, and graham crumbs together. Mix into the creamed base until combined, then fold in the main 1 cup chips and 1 cup mini marshmallows.
- Spread the dough evenly into the lined pan. If desired, scatter the separate 2 tablespoons chips and ¼ cup marshmallows over the top.
- Bake 25–35 minutes until the edges are golden and the center cookie dough is set. Check a dough section away from melted mix-ins; shield loosely if the top browns too fast.
- Cool in the pan about 90 minutes, continuing until firm enough to lift. Use the parchment to transfer to a board and cut 12 large bars or 24 smaller pieces.
