Craving the classic campfire delight but without the fuss of an open flame? Look no further! Our irresistible No-Bake Chocolate Marshmallow Bars are here to redefine your dessert experience. Imagine a rich, creamy chocolate and peanut butter marshmallow layer nestled atop a perfectly buttery graham cracker crust. It’s a symphony of textures and flavors that will transport you straight to s’mores heaven, only better and much easier to enjoy anytime, anywhere.

These delectable S’more Bars are a nostalgic nod to the beloved Cathedral Cookies many of us remember from childhood holiday gatherings. You know the ones – those festive mini marshmallows held together by luscious chocolate? We’ve taken that cherished concept and elevated it, introducing creamy peanut butter for an added dimension of flavor and a sturdy, buttery graham cracker crust to create the ultimate no-bake cookie bar. The result? A remarkably satisfying treat that earns two thumbs way up every single time. Prepare to make these delicious bars a staple in your recipe rotation, delighting family and friends alike. We’re confident you’ll adore them as much as we do!
Why You Will Love These No-Bake Chocolate Marshmallow Bars
These No-Bake Chocolate Marshmallow Bars aren’t just a dessert; they’re an experience. Here’s why they’re destined to become your new favorite:
- Effortless Preparation: As the name suggests, there’s absolutely no baking required! This makes them perfect for hot summer days, busy schedules, or when you just want a fantastic dessert without turning on the oven.
- Irresistible Flavor Combination: The classic pairing of chocolate and peanut butter is elevated by the sweet, chewy mini marshmallows and the crunchy graham cracker crust. It’s a harmonious blend that appeals to all ages.
- Nostalgic Charm: These bars evoke the joyful memories of s’mores around a campfire or those beloved Cathedral Cookies from holiday parties, bringing a comforting, familiar taste with a modern twist.
- Perfect for Any Occasion: Whether you’re hosting a backyard barbecue, looking for a potluck contribution, planning a birthday party treat, or simply craving a sweet snack, these bars are versatile and always a hit.
- Make-Ahead Friendly: They need time to chill, making them an ideal dessert to prepare in advance. This frees you up to enjoy your event without last-minute dessert stress.
- Customizable: While perfect as is, these bars offer endless possibilities for customization with different chocolate types, nut butters, or fun toppings.
Key Ingredients for Your No-Bake S’more Bars
Creating these delightful Chocolate Peanut Butter Marshmallow Bars requires a handful of simple ingredients, readily available at any grocery store. The beauty of this recipe lies in its simplicity and the quality of these core components coming together to create something truly magical.

- Semi-Sweet Chocolate Chips: The star of our chocolate layer. Semi-sweet offers a balanced sweetness that pairs wonderfully with the peanut butter and marshmallows. You can also experiment with milk chocolate for a sweeter bar or dark chocolate for a richer, less sweet profile.
- Creamy Peanut Butter: Essential for that signature creamy texture and savory counterpoint to the sweetness. Opt for a smooth, classic creamy peanut butter. While natural peanut butter can be used, its oil separation might alter the texture slightly.
- Mini Marshmallows (16 oz bag): These soft, chewy pockets are what give the bars their beloved texture and s’mores-like appeal. Mini marshmallows integrate best into the chocolate mixture, ensuring every bite has a perfect marshmallow chew.
- Graham Crackers (Full sheets): The foundation of our buttery crust. You’ll need about 12 full sheets, which translates to roughly 1 ¾ to 2 cups of finely crushed crumbs.
- Melted Butter (Sweet Cream, Salted): Binds the graham cracker crumbs together, creating a firm and flavorful crust. Salted butter enhances the overall flavor, but unsalted butter with a pinch of salt added will also work.
- Granulated Sugar: Adds just the right amount of sweetness to the graham cracker crust, balancing the buttery notes.
Before you begin, ensure all your ingredients are measured out and ready. This “mise en place” approach makes the no-bake process even smoother and more enjoyable!
Crafting the Perfect Graham Cracker Crust
A phenomenal dessert begins with a strong foundation, and for our No-Bake Chocolate Marshmallow Bars, that foundation is a simple yet incredibly flavorful graham cracker crust. This layer provides a delightful crunch that contrasts beautifully with the soft, chewy topping.

Step 1: Crush Your Graham Crackers. Begin by placing the full graham cracker sheets into a sturdy plastic freezer bag. Seal the bag, removing as much air as possible. Using a rolling pin, finely crush the crackers until they resemble fine crumbs. It’s crucial to eliminate any large chunks, as smaller, consistent crumbs will ensure a more cohesive crust that adheres perfectly to the marshmallow-chocolate layer. Alternatively, for a super fine and even crumb, you can pulse the graham crackers in a food processor until uniformly crushed.
Step 2: Add the Sweetness. Once your graham cracker crumbs are finely crushed, open the plastic bag and add the granulated sugar. The sugar not only adds a touch of sweetness but also helps in binding the crust when combined with butter.
Step 3: Introduce the Butter. Carefully pour the melted butter into the plastic bag with the cracker crumbs and sugar. Make sure your butter is fully melted but not overly hot, to avoid inadvertently cooking the crumbs.
Step 4: Combine Thoroughly. Close the bag securely once more, then use your hands to massage the graham cracker crumbs, sugar, and melted butter together. Continue massaging until all the crumbs are evenly coated with the butter. You should see a moist, sandy texture, indicating that the butter has fully incorporated, ready to form a firm crust.

Step 5: Prepare Your Pan. Line a 9×13 inch baking dish with a sheet of parchment paper. It’s important to ensure the edges of the parchment paper extend up and over the sides of the pan. These parchment “handles” will be your best friend later, making it incredibly easy to lift the entire batch of bars out of the pan for clean cutting into individual pieces.
Step 6: Form and Chill the Crust. Pour the buttered graham cracker mixture into the prepared baking dish. Using the back of a measuring cup, a flat-bottomed glass, or your clean hands, press the crumbs down firmly and evenly into the bottom of the pan. The more tightly packed the crust, the less likely it is to crumble when cut. Once pressed, refrigerate the graham cracker crust for at least one hour. This chilling period is essential as it allows the butter to solidify, setting the crust and creating a sturdy, delicious base for your marshmallow layer.
Creating the Irresistible Chocolate Marshmallow Layer
The heart of these No-Bake Chocolate Marshmallow Bars lies in their decadent, chewy chocolate and peanut butter marshmallow topping. This layer is both rich and playful, a true highlight of the dessert.

Step 7: Start with the Chocolate and Peanut Butter. Once your graham cracker crust has had ample time to set in the refrigerator (at least 1 hour), it’s time to prepare the chocolate marshmallow mixture. In a medium-sized saucepan, combine the semi-sweet chocolate chips and the creamy peanut butter.
Step 8: Gently Melt the Mixture. Place the saucepan over medium-low heat. It’s crucial to melt the chocolate chips slowly and gently to prevent scorching. Stir frequently with a rubber spatula or wooden spoon to ensure the chocolate chips and peanut butter melt smoothly and combine into a cohesive, velvety mixture. As soon as the chocolate is completely melted and the mixture is smooth, remove the saucepan from the heat. Allow this rich chocolate and peanut butter base to cool slightly for about five minutes. This brief cooling period is important because adding marshmallows to very hot chocolate can cause them to melt too quickly and disappear into the mixture, rather than retaining their delightful chewy texture.
Step 9: Introduce the Mini Marshmallows. After the chocolate mixture has cooled for a few minutes, add the entire bag of mini marshmallows into the saucepan. The smaller size of the marshmallows ensures they distribute evenly throughout the bars and provide that perfect bite of chewiness.
Step 10: Fold to Combine. With a gentle hand, fold the marshmallows into the slightly cooled chocolate mixture. Continue folding until all the mini marshmallows are thoroughly coated with the rich chocolate and peanut butter. The goal is to coat them completely while still allowing them to maintain their individual shape and chewiness. This creates that characteristic textured layer that makes these bars so unique and delicious.

Step 11: Assemble and Chill. Carefully pour the warm, sticky chocolate marshmallow mixture evenly over the chilled graham cracker crust in your baking dish. You can use the back of your spatula to gently spread it out, ensuring an even layer from edge to edge. Once spread, return the baking dish to the refrigerator and allow the chocolate to harden completely. This will typically take at least 2-3 hours, or even better, overnight. A well-chilled chocolate layer will be much easier to cut and will result in clean, firm bars.
Serving and Storage Instructions for Peak Enjoyment
Once your No-Bake Chocolate Marshmallow Bars have properly chilled and firmed up, the moment of truth arrives! Here’s how to serve them for maximum enjoyment and keep them fresh for future cravings.

Step 12: Cut and Serve. When the chocolate layer has completely firmed up – it should be firm to the touch and no longer sticky – carefully lift the entire slab of bars out of the pan using the parchment paper overhangs. Place the slab onto a cutting board. Using a sharp knife, cut the large rectangle into individual pieces. For best results and clean cuts, you can warm your knife slightly by running it under hot water and then wiping it dry between cuts. This helps glide through the chocolate and marshmallow without dragging. These delightful bars are best served at room temperature, as this allows the chocolate and marshmallows to soften slightly, enhancing their texture and flavor. However, a slightly chilled bar can also be very refreshing, especially on a warm day.

Storage Tips:
These Chocolate Peanut Butter Marshmallow Bars are excellent for making ahead, and they store beautifully, ensuring you can enjoy them over several days or even months:
- Room Temperature: If you plan to consume them within a day or two, they can be stored in an airtight container at cool room temperature. However, for optimal freshness and to prevent them from becoming too soft, refrigeration is generally recommended.
- Refrigeration: For longer storage, place the cut bars in an airtight container with layers separated by parchment paper to prevent sticking. They will stay fresh and delicious in the refrigerator for up to a week.
- Freezing: These bars freeze exceptionally well! Arrange the individual bars in a single layer on a baking sheet and freeze until solid (about 1-2 hours). Once frozen, transfer them to a freezer-safe airtight container or heavy-duty freezer bag, again separating layers with parchment paper. They can be frozen for up to 3 months. To enjoy, simply thaw them at room temperature for about 30-60 minutes, or enjoy them slightly chilled for a firmer treat.
Tips for Success & Delightful Variations
While this recipe for No-Bake Chocolate Marshmallow Bars is incredibly straightforward, a few tips can ensure absolute perfection every time. Plus, don’t shy away from experimenting with fun variations!
Tips for the Best No-Bake Bars:
- Finely Crush Crackers: Don’t underestimate this step! Super fine graham cracker crumbs create a uniform, sturdy crust that holds together without crumbling. A food processor is your best friend here.
- Press Crust Firmly: The firmer you press the crust into the pan, the better it will hold together when cut. Use the bottom of a measuring cup or a flat glass for even pressure.
- Don’t Rush the Chill: Both the initial crust chill and the final setting time are crucial. Adequate chilling ensures the bars are firm, easy to cut, and not a sticky mess. Patience is key!
- Melt Chocolate Gently: Always use medium-low heat when melting chocolate chips and peanut butter. Overheating can cause the chocolate to seize or burn, ruining the texture and flavor. Stir constantly!
- Cool Chocolate Slightly: Letting the melted chocolate mixture cool for 5 minutes before adding marshmallows prevents them from melting completely. You want distinct, chewy marshmallow pockets, not a uniform goo.
- Line with Parchment Paper: This simple step makes removing the entire slab of bars effortless, allowing for cleaner cuts and presentation. Leave an overhang!
- Warm Your Knife: For extra clean cuts, especially through the chocolate layer, run your knife under hot water, wipe it dry, and then slice. Repeat as needed.
Creative Variations to Try:
- Different Chocolate: Swap semi-sweet chips for milk chocolate for a sweeter bar, dark chocolate for a richer intensity, or even white chocolate for a different flavor profile.
- Nut Butter Alternatives: While peanut butter is classic, try almond butter, cashew butter, or even sunflower seed butter for a nut-free option (ensure no other nut-based ingredients are present for true allergy safety).
- Crust Customization: Instead of graham crackers, try crushed Oreo cookies (for a “Cookies and Cream” twist), vanilla wafers, or even shortbread biscuits. Adjust butter quantity slightly as needed.
- Add-Ins Galore: Fold in extra ingredients with the marshmallows! Think chopped nuts (pecans, walnuts), shredded coconut, sprinkles, or even chopped mini candy bars for extra crunch and flavor.
- Flavor Extracts: A dash of vanilla extract or a hint of peppermint extract (especially around the holidays) can elevate the chocolate layer. Add it when the chocolate is melted.
- Top with Drizzle: Once the bars are set, melt a small amount of chocolate or peanut butter and drizzle it over the top for an attractive finish and an extra layer of flavor.
These tips and variations ensure that your No-Bake Chocolate Marshmallow Bars are always a roaring success and can be tailored to suit any taste or occasion. Enjoy the creative process!
Other Marshmallow Desserts You Will Love
If you’ve fallen in love with the chewy, sweet delight of marshmallows in these bars, then you’re in for a treat! Marshmallows are incredibly versatile and can elevate a wide array of desserts. Here are a few other marshmallow-centric recipes that are sure to become new favorites in your kitchen:
- Sweet and Salty Marshmallow Popcorn: A delightful combination of crunchy popcorn and gooey marshmallows, often with a hint of salt for that irresistible sweet-and-savalty balance. Perfect for movie night!
- Decadent Chocolate Marshmallow Pops: Simple yet elegant, these involve marshmallows dipped in rich chocolate and often decorated with sprinkles or drizzles. A fantastic party treat or edible gift.
- The Best Homemade Marshmallow Recipe: Elevate your marshmallow experience by making them from scratch! Homemade marshmallows are unbelievably light, fluffy, and far superior to store-bought varieties.
- Irresistible S’more Pie: All the beloved flavors of s’mores captured in a convenient, shareable pie form. Think graham cracker crust, a rich chocolate filling, and a toasted marshmallow topping.
Each of these recipes showcases the magical quality of marshmallows, transforming simple ingredients into extraordinary desserts. Explore them all and find your next favorite sweet indulgence!
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Print Recipe
No-Bake Chocolate Marshmallow S’more Bars
18 bars
20 minutes
5 minutes
25 minutes
These No-Bake Chocolate Marshmallow Bars feature a rich chocolate, creamy peanut butter, and soft marshmallow layer sitting on a bed of perfectly buttery graham cracker crust. It’s truly like a S’more, only better and easier!
Ingredients
- 4 cups Semi-Sweet Chocolate Chips
- 1 cup Creamy Peanut Butter
- 1 bag Mini Marshmallows (16 oz.)
- 12 Graham Crackers (Full sheets, crushed)
- 1/2 cup Melted Butter (Sweet Cream, Salted)
- 1/3 cup Granulated Sugar
Instructions
- Add the Graham Cracker sheets to a plastic bag. Finely crush them with a rolling pin or food processor. Ensure there are no large chunks for a smooth, cohesive crust.
- Add the granulated sugar to the plastic bag with the crushed graham crackers.
- Pour the melted butter into the plastic bag.
- Close the bag and massage the graham cracker crumbs with the sugar and butter until all crumbs are thoroughly coated and moist.
- Line a 9×13 inch baking dish with parchment paper, allowing the edges to overhang. This will assist in lifting the bars later.
- Press the buttered graham cracker crumbs firmly and evenly into the bottom of the prepared baking pan using the back of a measuring cup. Refrigerate the crust for at least one hour to allow it to set.
- After the crust has set, prepare the chocolate marshmallow mixture. In a medium-sized saucepan, add the Semi-Sweet Chocolate Chips and creamy Peanut Butter.
- Melt the chocolate chips and peanut butter over medium-low heat, stirring frequently until completely smooth. Remove from heat and allow to cool for five minutes.
- Add the Mini Marshmallows to the slightly cooled chocolate mixture.
- Gently fold the marshmallows into the chocolate mixture until they are completely covered.
- Pour the Chocolate Marshmallow Mixture over the graham cracker crust, spreading it evenly. Return the dish to the refrigerator and allow the chocolate layer to harden for at least 2-3 hours, or preferably overnight.
- Once the chocolate has firmed up, use the parchment paper to lift the entire slab of bars from the pan. Cut into individual pieces with a sharp knife. Serve at room temperature for the best texture.
Notes
The Chocolate Marshmallow Bars can be stored in an airtight container at room temperature for up to 2 days, or refrigerated for up to a week. For longer storage, they can be frozen for up to 3 months in an airtight freezer-safe container, separated by parchment paper. Thaw at room temperature before serving.
Did you Make this Recipe? Leave a review below, then snap a picture and tag @twosisterscrafting on Instagram so we can see it!