Perfect Gooey S’mores Cookie Bars (Soft, Chewy, Bakery-Style)
Soft and chewy s’mores cookie bars made with graham cracker crumbs, melty chocolate, and gooey marshmallow pockets. These bakery-style dessert bars are perfectly balanced for a rich flavor, chewy texture, and clean slices every time.
Servings 14 bars
Calories 390kcal
Cost $8 for entire recipe
Equipment
- 9x13-inch baking pan (metal preferred for even baking)
- Parchment paper (for easy removal and clean slices)
- Large mixing bowl
- Medium mixing bowl
- Whisk
- spatula or wooden spoon
- Measuring cups and spoons
- Kitchen scale (optional, for precise measurements)
- Offset spatula or hands (for pressing dough evenly into the pan)
- Cooling rack (optional, for faster cooling)
Ingredients
- 1 cup 226g unsalted butter, melted or browned
- 1 cup 200g brown sugar
- ⅓ cup 65g granulated sugar
- 2 large eggs
- 2 tsp vanilla extract
- 1¾ cups + 1 tbsp 225g all-purpose flour
- ¾ cup 90g graham cracker crumbs
- ½ tsp baking soda
- 1 tsp salt
- 1⅓ cups 225g chopped chocolate or chocolate chips
- 1 cup mini marshmallows divided
- ¾ cup for inside
- ¼ cup for topping
- 1–2 graham crackers broken (optional topping)
Instructions
- Preheat oven to 350°F (175°C). Line a 9x13-inch pan with parchment paper.
Mix wet ingredients
- In a large bowl, whisk melted butter, brown sugar, and granulated sugar until smooth and glossy. Add eggs and vanilla extract and whisk until slightly thickened.
Mix dry ingredients
- In another bowl, whisk flour, graham cracker crumbs, baking soda, and salt.
Combine
- Add dry ingredients to wet ingredients and mix just until combined. Fold in chocolate. The dough should be thick and slightly sticky.
Assemble
- Press about ¾ of the dough evenly into the prepared pan. Sprinkle ¾ cup marshmallows evenly over the dough. Add remaining dough in small flattened pieces over the top, leaving small gaps. Finish with remaining marshmallows and optional graham cracker pieces.
Bake
- Bake for 25–30 minutes, checking at 25 minutes.
- Bars are done when:
- Edges are golden and set
- Center is soft but no longer glossy
- Top is lightly golden
- If the top browns too quickly, loosely tent with foil.
Cool
- Let cool in the pan for at least 1 hour before slicing into bars.
Notes
These s’mores cookie bars are designed to deliver a perfect balance of chewy texture, gooey marshmallow pockets, and rich chocolate flavor. Follow these key tips to get consistent, bakery-quality results every time.
These tips ensure your easy s’mores cookie bars recipe turns out perfectly chewy, gooey, and flavorful every time, just like a bakery-style dessert bar.
🍪 Texture & Structure Tips
For soft and chewy cookie bars, avoid overmixing the dough once the dry ingredients are added. Overmixing can develop too much gluten and lead to a tougher, less tender texture. The dough should be thick, soft, and slightly sticky before baking.🔥 Baking Accuracy
The most important step is pulling the bars at the right time. The edges should be golden and set, while the center should look slightly soft but no longer glossy. Overbaking will dry out the bars, while underbaking can make them too soft to slice cleanly.🍫 Chocolate Choice Matters
Using chopped chocolate instead of standard chocolate chips creates better melt pockets and a richer flavor throughout the bars. A mix of milk chocolate and semi-sweet chocolate gives the most classic s’mores flavor profile.🔥 Marshmallow Placement
Placing most of the marshmallows inside the bars rather than fully on top helps prevent burning and creates gooey pockets throughout. A small amount on top gives that classic toasted look without overbrowning.🧈 Butter Flavor Upgrade
Browning the butter before mixing adds a deep, caramelized flavor that enhances the graham cracker base and chocolate. This step is optional but highly recommended for a more gourmet result.🧁 Pan & Even Baking
A metal baking pan is ideal for even heat distribution and consistent baking. Glass pans can cause the edges to overbake before the center is fully set, so adjust baking time accordingly if using one.❄️ Cooling for Clean Slices
Allow the bars to cool for at least 1 hour before slicing. This resting time helps the structure set properly, ensuring clean, bakery-style cuts instead of crumbly or overly soft pieces.🧊 Storage & Freshness
These cookie bars stay soft and chewy for several days when stored in an airtight container at room temperature. For best texture, briefly warm individual bars before serving to bring back the gooey marshmallow and melted chocolate.⭐ Flavor Balance Tip
A full teaspoon of salt is essential in this recipe to balance the sweetness from marshmallows and chocolate. This creates a more complex flavor and prevents the bars from tasting overly sweet.These tips ensure your easy s’mores cookie bars recipe turns out perfectly chewy, gooey, and flavorful every time, just like a bakery-style dessert bar.