S’mores Cookie Bars deliver gooey marshmallows, melty chocolate, and crunchy graham goodness in every chewy bite. Gooey marshmallows meet melty chocolate and crunchy graham in chewy, shareable bars that bring campfire vibes to your cookie jar. With crunchy edges hugging pillowy marshmallow pockets and ribbons of melted chocolate swirls over a buttery graham-infused base, these bars capture campfire nostalgia and oozy charm—perfect for dessert lovers and beginner bakers alike who want to share a taste of camping magic right from home.
Key Ingredients
Let’s break down the stars of the show—simple pantry staples that come together to create these irresistible S’mores Cookie Bars:
- 1 cup unsalted butter, softened: Provides a rich, buttery base that keeps the bars moist and tender.
- 1 cup granulated sugar: Adds sweetness and helps create crispy edges.
- 1 cup packed brown sugar: Contributes caramel notes and extra chewiness.
- 2 large eggs: Bind the dough and give structure while adding moisture.
- 1 teaspoon vanilla extract: Enhances all the sweet flavors with a warm, aromatic touch.
- 3 cups all-purpose flour: Forms the sturdy graham cookie base.
- 1 teaspoon baking soda: Leavens the dough for a tender crumb.
- 1 teaspoon salt: Balances sweetness and deepens flavor.
- 1 cup graham cracker crumbs: Infuses classic s’mores crunch and flavor throughout.
- 1 cup semisweet chocolate chips: Delivers gooey chocolate pockets in every bite.
- 1 cup mini marshmallows: Creates those signature pillowy pockets of campfire nostalgia.
How To Make S’mores Cookie Bars
This recipe is delightfully hands-on but totally beginner-friendly—just cream, mix, fold, press, and bake! You’ll combine your wet ingredients, whisk the dry ingredients separately, then gently bring everything together before pressing into a pan. Once baked, you’ll have golden edges, melty marshmallows, and chocolate swirls that scream “campfire treat.” Ready? Let’s dive into each step.
1. Preheat the oven to 350°F and line a 9×13-inch baking pan with parchment paper, leaving an overhang on two sides for easy removal.
2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light, fluffy, and pale in color—about 3 to 4 minutes.
3. Beat in the eggs one at a time, ensuring each is fully incorporated, then stir in the vanilla extract until smooth.
4. In a separate bowl, whisk together the all-purpose flour, baking soda, and salt to distribute the leavening and seasoning evenly.
5. Gradually add the dry ingredients to the wet mixture, stirring until just combined to avoid overmixing and keep the bars tender.
6. Fold in the graham cracker crumbs, semisweet chocolate chips, and mini marshmallows until they’re evenly distributed throughout the dough.
7. Press the dough firmly and evenly into the prepared pan, smoothing the top with your hands or an offset spatula.
8. Bake for 20 to 25 minutes, or until the edges turn golden and a toothpick inserted into the center comes out with a few moist crumbs attached.
9. Allow the bars to cool completely in the pan before using the parchment overhang to lift them out and cut into squares.
Serving Suggestions
Ready to share these gooey bars? Here are four fun ways to serve them perfectly:
- With a scoop of vanilla ice cream: Place a warm bar on a plate and top with melting ice cream for a delightful contrast of temperatures.
- Drizzled with chocolate sauce: Gently warm extra semisweet chips with a splash of cream, then drizzle for an extra-chocolatey finish.
- At room temperature: Let the bars rest for at least 30 minutes so the marshmallows set, making each square easy to handle.
- Cut into bite-size squares: Perfect for parties—use a sharp knife and wipe between cuts for clean, uniform pieces.
Tips For Perfect S’mores Cookie Bars
These S’mores Cookie Bars are already a crowd-pleaser, but a few friendly tricks will elevate them even more. Pressing the dough evenly ensures every square bakes at the same rate and cuts beautifully. If your little marshmallow peaks start to toast before the center’s done, covering with foil mid-bake will shield them. To keep that newly baked gooey goodness fresh, store at room temperature in an airtight container. And for marshmallow lovers? Pop a few extra on top right after baking so they melt into golden, squishy clouds.
- Make sure the dough is pressed evenly for uniform baking and clean cuts.
- If the marshmallows brown too quickly, loosely cover the pan with foil halfway through baking.
- Store cooled bars in an airtight container at room temperature for up to 3 days.
- For an extra gooey topping, gently press a few additional marshmallows onto the hot bars immediately after baking.
How To Store It
Once you’ve pulled these bars from the oven, let’s talk storage so every bite stays as memorable as the first:
- Room temperature: After cooling, layer bars between parchment in an airtight container. They’ll stay soft and tasty for up to 3 days.
- Refrigeration: For a longer lifespan (about 5 days), wrap bars tightly in plastic wrap and store in the fridge—just bring back to room temp before serving.
- Freezing: Individually wrap cooled squares in plastic and freeze in a zip-top bag for up to 2 months. Thaw at room temperature for 30–60 minutes.
- Reheating: Warm a single bar in the microwave for 10–15 seconds to revive the gooey marshmallows and chocolate.
Frequently Asked Questions
Have a question? You’re not alone—here are the answers you need:
- How can I tell when the S’mores Cookie Bars are fully baked?
The bars are done when the edges turn a light golden brown and a toothpick inserted into the center comes out with a few moist crumbs attached. If the toothpick is completely wet with batter, bake for an additional 2–3 minutes and check again.
- Can I substitute salted butter for unsalted butter in this recipe?
Yes, you can use salted butter, but omit or reduce any additional salt in your recipe if necessary. Since this recipe already calls for 1 teaspoon of salt, you may want to decrease it to ½ teaspoon to avoid overly salty results.
- What’s the best way to press the dough into the pan for even baking and clean cuts?
Line your 9×13-inch pan with parchment paper leaving a 2-inch overhang on each side. After mixing, use an offset spatula or your hands (lightly dampened to prevent sticking) to press the dough evenly into all corners and edges. An even thickness ensures uniform baking and makes it easier to lift the entire block out for slicing.
- How do I prevent the mini marshmallows from browning too quickly or burning?
If you notice the marshmallows browning before the bars are fully baked, loosely drape a piece of aluminum foil over the top halfway through the baking time. This shields the marshmallows while allowing the center to continue cooking.
- Can I prepare the dough ahead of time or freeze the bars?
Yes. You can refrigerate the assembled dough in the lined pan (covered) for up to 24 hours and then bake as directed. For cooling bars, wrap individual cooled squares in plastic wrap and store in an airtight container in the freezer for up to 2 months. Thaw at room temperature for 30–60 minutes before serving.
- What storage method keeps the bars fresh and gooey?
Once cooled, store the bars in an airtight container at room temperature for up to 3 days. For extra gooey marshmallows, press a few fresh mini marshmallows onto the surface immediately after baking and let them set before covering.
- Are there any suggested ingredient swaps for dietary preferences?
You can replace half of the all-purpose flour with whole wheat flour for added fiber, though the texture may be slightly denser. To make them gluten-free, use a 1:1 gluten-free flour blend and ensure your graham cracker crumbs are gluten-free. Dairy-free butter substitutes can be used, but results may vary in flavor and consistency.
What Makes This Special
What puts these S’mores Cookie Bars in the hall of fame? They’re the perfect mash-up of nostalgic campfire flavors—crunchy graham, molten chocolate, and pillowy marshmallow—all in one easy-bar form. They’re beginner-friendly but feel like a gourmet treat, so go ahead and print this recipe, stash it in your cookbook, and get ready for endless compliments. Tried it? Let me know how your bars turned out or drop any questions below—I’m here to help you nail that gooey, golden-baked perfection!
S’mores Cookie Bars
Description
Crunchy edges meet pillowy marshmallow pockets and melted chocolate swirls over a buttery graham-infused base, each bite capturing campfire nostalgia and gooey charm.
Ingredients
Instructions
-
Preheat the oven to 350°F and line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
-
In a large bowl, cream together the unsalted butter, granulated sugar, and brown sugar until light and fluffy.
-
Beat in the eggs one at a time, then stir in the vanilla extract until well combined.
-
In a separate bowl, whisk together the all-purpose flour, baking soda, and salt.
-
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
-
Fold in the graham cracker crumbs, semisweet chocolate chips, and mini marshmallows until evenly distributed.
-
Press the dough evenly into the prepared baking pan.
-
Bake for 20 to 25 minutes, or until the edges are golden and a toothpick inserted into the center comes out with a few moist crumbs.
-
Allow the bars to cool completely in the pan before lifting out with the parchment overhang and cutting into squares.
Note
- Make sure the dough is pressed evenly for uniform baking and clean cuts.
- If the marshmallows brown too quickly, loosely cover the pan with foil halfway through baking.
- Store cooled bars in an airtight container at room temperature for up to 3 days.
- For an extra gooey topping, gently press a few additional marshmallows onto the hot bars immediately after baking.
