Gluten Free S’Mores Bars

These Gluten Free S’Mores Bars are ooey-gooey with marshmallow, chocolate, and graham cracker flavor. Easy to make, perfect for parties and family treats!

Last summer, my family spent a long weekend at a cabin in the mountains — the kind of trip where the kids run wild and the adults finally exhale. We made s’mores around the fire pit every single night, and somewhere between the third sticky marshmallow and the chocolate smeared across my youngest’s cheek, I thought: why can’t I have this feeling all year round? That’s how these gluten free s’mores bars were born — all the campfire nostalgia packed into a pan, no flames required.

Well… the truth is, I tested this recipe four times before I got it exactly right. The graham cracker base needed to be buttery without crumbling apart, the marshmallow layer had to stay gooey without turning into cement, and the chocolate had to melt into little rivers between the cookie dough topping. When I finally nailed it, the bars were as indulgent and tender as a freshly toasted s’more — but sliceable, shareable, and gluten free from top to bottom.

Ever wished you could bring that Fourth of July campfire dessert vibe to a random Tuesday? These gluten free smores bars deliver exactly that. They’re perfect for bake sales, potlucks, lunchboxes, or honestly just eating over the kitchen sink at 9 PM when the kids are finally asleep. No judgment here — only chocolate.

Why These Graham Cracker Bars Are a Game-Changer

Most gluten-free s’mores recipes rely on store-bought components that don’t quite hold together — crumbly crackers, melty chocolate that slides everywhere, marshmallow that sticks to everything except the dessert. These gluten free s’mores bars solve all of that by building the graham cracker flavor right into a sturdy, buttery cookie dough base.

The secret is combining a gluten-free flour blend with real graham cracker crumbs, which gives you that warm, honey-cinnamon flavor without needing to stack fragile crackers. According to the Celiac Disease Foundation’s guide to safe gluten-free baking ingredients, using certified gluten-free flour blends that include a binder like xanthan gum is essential for achieving proper structure in baked goods — and that’s exactly what holds these marshmallow bars together so beautifully.

Ingredients

Everything you need for these gluten free s’mores bars, laid out for easy scanning.

Ingredient	Amount	Notes
Gluten-free baking flour blend	1 cup	Must include binder (xanthan gum); see notes
Gluten-free graham cracker crumbs	1 cup	Kinnikinnick brand recommended
Baking powder	½ tsp
Salt	¼ tsp
Butter or vegan butter	½ cup (1 stick)	Softened to room temperature
Brown sugar	¾ cup	Packed
Large egg	1	Room temperature preferred
Vanilla extract	1 tsp
Gluten-free marshmallow crème or fluff	7 oz	Marshmallow Fluff brand recommended
Gluten-free dark or semi-sweet chocolate chips	1¼ cups	Enjoy Life Dark Morsels recommended

A note on flour blends: Make sure your gluten-free flour blend already contains a binder like xanthan gum or guar gum — this is what gives the dough its hold. Bob’s Red Mill 1-to-1 and King Arthur Measure for Measure are both reliable choices for these graham cracker bars. If your blend doesn’t include a binder, add ½ teaspoon of xanthan gum to the dry ingredients.

Instructions

Step 1: Prep Your Pan

Preheat your oven to 350°F. Spray an 8×8-inch baking pan with nonstick cooking spray or line it with parchment paper, leaving a bit of overhang on two sides for easy lifting later. Set the prepared pan aside.

Step 2: Mix the Dry Ingredients

In a medium mixing bowl, whisk together the gluten-free flour blend, graham cracker crumbs, baking powder, and salt until everything is evenly combined. The graham cracker crumbs will give off that familiar warm, honey-cinnamon aroma right away — it smells like summer campfires before you even turn on the oven. Set this bowl aside for now.

Step 3: Cream the Butter and Sugar

In the bowl of a stand mixer fitted with the paddle attachment (or a large bowl with a hand mixer), beat the softened butter and brown sugar together on medium-high speed for about 2 minutes. Scrape down the sides of the bowl halfway through. The mixture should look light, fluffy, and noticeably creamy — this is the foundation that makes your gluten free s’mores bars tender rather than dense.

Step 4: Add the Wet Ingredients and Combine

Scrape down the bowl again, then add the egg and vanilla extract. Mix on low speed until just incorporated — about 15 to 20 seconds. Add the flour and graham cracker mixture and mix on low until the dough comes together. It’ll be thick and slightly sticky, which is exactly what you want. Let the dough rest for 5 minutes so the flour can hydrate fully.

Step 5: Press the Bottom Layer

Scoop a little more than half of the dough into the prepared baking pan. Press it into an even layer across the bottom — wetting your fingertips with a bit of water makes this much easier and prevents the dough from sticking to your hands. Don’t worry about making it magazine-perfect; a mostly-even layer is the goal for these gluten free smores bars.

Step 6: Add the Marshmallow Layer

Dollop the marshmallow crème or fluff over the pressed dough in big spoonfuls. Use the back of a spoon (dipped in water to prevent sticking) to gently spread it into a fairly even layer. It doesn’t need to be pristine — a little unevenness means some bites will be extra marshmallow-rich, which is honestly a bonus. The fluff should cover most of the dough surface for these marshmallow bars.

Step 7: Top with Chocolate and Cookie Dough

Scatter the chocolate chips evenly over the marshmallow layer — they’ll melt into gorgeous little pockets during baking. Using a cookie scoop or a spoon, dollop the remaining dough in mounds across the top. Don’t press them flat; the dough will spread and puff as it bakes, creating a beautifully rustic, golden-brown topping.

Step 8: Bake

Slide the pan into the center of the oven and bake for 32 to 35 minutes, rotating the pan 180 degrees halfway through for even browning. The marshmallow will puff up between the cookie dough scoops — that’s totally normal and actually looks amazing. The gluten free s’mores bars are done when the top is golden brown and the center feels set when you gently press it. Err on the side of slightly overbaking rather than underbaking — a few extra minutes ensures the inside firms up properly.

Step 9: Cool and Rest (This Part Matters!)

Let the bars cool completely in the pan on a wire rack. Then — and this is the step that takes patience — let them sit for at least 12 hours before slicing. I know that sounds agonizing, but the overnight rest allows the marshmallow to set, the chocolate to firm, and the layers to bond together. For the cleanest slices on your graham cracker bars, refrigerate the pan before cutting with a sharp knife.

Smart Substitutions

Butter swap: Vegan butter (like Miyoko’s or Earth Balance) works as a one-to-one replacement, making these gluten free s’mores bars dairy-free. Just make sure the vegan butter is softened to room temperature before creaming — cold vegan butter doesn’t cream as smoothly. The bars will taste just as buttery and rich.

Graham cracker crumb alternatives: If you can’t find Kinnikinnick gluten-free graham crackers, you can crush any certified gluten-free graham-style cookie into fine crumbs. Some people also use gluten-free digestive biscuits or even crushed gluten-free vanilla cookies — the flavor shifts slightly but the texture stays right. You need 1 cup of fine, even crumbs for these marshmallow bars.

Egg substitute: A flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons warm water, rested for 5 minutes) is a solid vegan swap here. The dough may be slightly less cohesive, so press the bottom layer a bit more firmly. Your gluten free smores bars will still hold together beautifully after the overnight rest.

Chocolate chip options: You know… any gluten-free chocolate chip works here, but darker chocolate (60–70% cacao) gives you a richer, more grown-up flavor that balances the sweet marshmallow. Milk chocolate chips make the bars sweeter overall, which kids tend to prefer. You could even use a mix of both for the best of both worlds.

Marshmallow crème substitute: If you can’t find Marshmallow Fluff, Suzanne’s Ricemellow Creme is a great vegan-friendly alternative that spreads easily. Regular marshmallows won’t work the same way here — they don’t spread into a smooth layer before baking. Stick with a crème or fluff for the gooiest gluten free s’mores bars.

Troubleshooting Tips

The bars are crumbly when I slice them: This usually means they didn’t rest long enough before cutting. That 12-hour rest period isn’t just a suggestion — it’s essential for the layers to bind together. Pop the pan into the fridge for an extra hour before slicing, and use a sharp knife in one clean downward motion rather than a sawing action.

The top is browning too fast: If the cookie dough topping is getting dark before the center is set, tent the pan loosely with aluminum foil for the last 10 minutes of baking. Every oven runs a little differently, so keep an eye on your gluten free s’mores bars after the 25-minute mark. Rotating the pan halfway through also helps prevent hot spots.

The marshmallow layer is sticky and messy to spread: Dipping the back of your spoon in cold water between each spread makes a huge difference. The fluff is naturally sticky — that’s what makes it so deliciously gooey once baked. Don’t stress about perfection; uneven marshmallow means delightful pockets of extra gooeyness in your graham cracker bars.

The center seems underdone after baking: According to the King Arthur Baking guide on bar cookie doneness, bar desserts often look slightly underdone in the center when they first come out of the oven because they continue firming as they cool. Trust the process — if the top is set and golden, the 12-hour rest will take care of the rest. These marshmallow bars firm up significantly overnight.

Storage and Meal Prep

Storing at Room Temperature and in the Fridge

Store your gluten free s’mores bars in an airtight container at room temperature for 2 to 3 days, or in the refrigerator for up to 5 days. The fridge actually improves the texture — the chocolate firms up and the bars slice more cleanly when chilled. Let them sit at room temperature for 5 to 10 minutes before eating if you prefer a softer, gooier bite.

Freezing for Later

These gluten free smores bars freeze remarkably well. Wrap individual bars tightly in plastic wrap, then place them in a freezer-safe container or zip-top bag for up to 2 months. Thaw in the fridge overnight or at room temperature for about 30 minutes. Having a stash in the freezer means you’ve always got a homemade treat ready for unexpected guests or last-minute lunchbox additions.

Serving Suggestions and Pairings

Warm and Gooey

For the ultimate indulgence, pop a sliced bar in the microwave for 10 to 15 seconds — just enough to warm the marshmallow layer and soften the chocolate into little melty rivers. Top with a scoop of vanilla ice cream, and you’ve got a dessert that rivals any restaurant’s. This is how I served them at our last dinner party, alongside our elegant gluten-free tiramisu, and people genuinely gasped.

At Room Temperature

Straight from the counter, these graham cracker bars have a satisfying chew with pockets of firm chocolate and a sticky-sweet marshmallow center. They’re perfect for packing in lunchboxes, bringing to picnics, or setting out on a dessert platter. A dusting of powdered sugar on top adds a pretty finishing touch.

With Coffee or Hot Chocolate

These gluten free s’mores bars pair beautifully with a strong cup of coffee or a mug of hot cocoa — the rich chocolate and toasted marshmallow flavors are natural companions for warm, comforting drinks. It’s the kind of pairing that turns a Tuesday afternoon into something special.

Fun Variations and Dietary Tweaks

Fully Dairy-Free Version

Swap the butter for vegan butter, use dairy-free chocolate chips (Enjoy Life is already dairy free), and double-check your marshmallow crème brand — Marshmallow Fluff is naturally dairy free. With these easy switches, your gluten free s’mores bars become completely dairy-free without sacrificing any flavor or texture. It’s one of the simplest allergy-friendly adaptations you can make.

Peanut Butter S’Mores Bars

Dollop 3 to 4 tablespoons of creamy peanut butter (or sunflower seed butter for nut-free) over the marshmallow layer before adding the chocolate chips. The peanut butter melts into the fluff during baking and creates a nutty, salty-sweet layer that’s absolutely addictive. Man, oh man… this variation disappears even faster than the original.

Kid-Friendly Mini Bars

Bake the recipe in a 9×13-inch pan instead of 8×8 for thinner bars, and cut them into small, kid-sized squares. The thinner marshmallow bars are less messy for little hands and perfect for school treats or birthday party dessert tables. Reduce the bake time to about 22 to 25 minutes since the layer will be thinner.

S’Mores Bar Sundae

Crumble a baked bar over a bowl of vanilla ice cream and drizzle with hot fudge sauce and a sprinkle of mini marshmallows. It’s a deconstructed s’mores sundae that’s ridiculously fun and perfect for a summer dessert night. For a savory-then-sweet dinner flow, serve these after our rich and creamy gluten-free crack chicken — the contrast is perfection.

White Chocolate Raspberry Twist

Replace the dark chocolate chips with white chocolate chips and add ½ cup of freeze-dried raspberries, crumbled, over the marshmallow layer. The tart berry against the sweet marshmallow and buttery cookie base creates a completely different but equally gorgeous bar. This variation is stunning for bridal showers or spring celebrations.

Gluten Free S’Mores Bars FAQs

Time to Build Your Indoor Campfire

These gluten free s’mores bars are the kind of recipe that earns a permanent spot in your rotation — buttery, chocolatey, marshmallow-gooey, and genuinely easy to pull together. The hardest part is waiting that 12 hours for them to set, and even that gets easier when you know what’s waiting for you.

Bake them for a weekend treat, pack them for a road trip, or bring them to a gathering where you want to be the most popular person in the room. They work every single time. For more party-worthy ideas, our crowd-pleasing gluten-free jalapeño popper dip makes a fantastic savory companion before you break out these sweet bars.