S’mores Cookie Crumb Bars (gluten-free & vegan)

These gluten-free, vegan S’mores Cookie Crumb Bars are gooey, chocolatey, and irresistible! Layers of soft gluten-free chocolate chip cookie dough, vegan marshmallow fluff, and graham cracker crumbs layered and baked for 20 minutes for the perfect campfire-inspired treat with no campfire required.

There’s something about the flavor of s’mores that instantly takes you back to summer nights, campfires, and sticky fingers. These gluten-Free, vegan S’mores Cookie Crumb Bars bring all that nostalgia into one easy-to-make, oven-baked treat — no fire needed.

With a buttery chocolate chip cookie base, pockets of gooey vegan marshmallow fluff, and gluten-free graham cracker crumbs, each bite delivers that perfect s’mores balance of soft, chewy, and just a little bit of a crisp on top. And the best part? They’re completely plant-based and gluten–free, making them a great treat to share with your friends who have food sensitivities or allergies 🥰.

Why You’ll Love These S’mores Cookie Crumb Bars

• Campfire flavor without the smoke. Enjoy classic s’mores taste straight from your kitchen.
• One-bowl dough. Minimal dishes, maximum deliciousness.
• Refined sugar–free. Naturally sweetened with coconut sugar (and you can use a homemade marshmallow fluff for a completely refined sugar–free treat).
• Perfect texture. A tender cookie layer on the bottom, gooey marshmallow in the middle, and a cookie crumb top.

Ingredients

Dry Ingredients

Gluten-Free flour. You’ll want to use a blend of naturally gluten-free grains and starches designed to replace wheat flour in this baking recipe while maintaining texture and structure. I like to use this 1:1 gluten-free baking flour for the best results.

Coconut sugar. For a warm, caramel-like sweetness without refined sugar. I like this brand for baking.

Graham cracker crumbs. Adds crunch and that unmistakable s’mores flavor. I like this brand of gluten-free, vegan graham crackers and then I pulse them in the food processor into fine crumbs.

Baking powder. Helps the cookie layers rise slightly for a light, tender texture.

Baking soda. Works with the coconut sugar and marshmallow fluff to create a gentle lift and slightly golden edges.

Salt. Balances and brings out the sweet flavors.

Chocolate chips. Because what are s’mores without chocolate?! I like these naturally sweetened chocolate chips.

Wet Ingredients

Banana. Using mashed banana replaces the egg(s) and adds moisture. Banana helps to bind the dough while also allowing these cookie crumb bars to stay soft and moist.

Butter. Vegan butter creates that soft and rich cookie texture. You’ll want to melt it before adding it into the flour mixture.

Vanilla. Adds warmth and depth, enhancing the rich chocolate and marshmallow flavors.

Marshmallow fluff. For gooey, stretchy sweetness, the vegan marshmallow fluff is the star of this s’mores treat!

How to Make These S’mores Cookie Crumb Bars

Making these bars is as easy as layering and baking!

Prep.

Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy lifting.

Mix the dry ingredients.

In a medium bowl, whisk the flour, coconut sugar, graham cracker crumbs, baking soda, baking powder, and salt.

Add the wet ingredients.

Smash the banana and add it to the bowl with the flour along with the melted butter, and vanilla. Stir the cookie dough mixture until just combined, then fold in the chocolate chips.

Assemble the layers.

Press half of the cookie dough evenly into the prepared pan. Dollop marshmallow fluff across the surface (it doesn’t have to fully cover) and then crumble the remaining cookie dough over top of the marshmallow fluff, leaving some marshmallow that peeks through.

Bake.

Bake for 20-22 minutes, or until golden at the edges and set in the center. Cool in the pan for 20 minutes before lifting out and slicing into bars.

Storage.

Store covered at room temperature for up to 2 days or in the fridge for up to a week. I actually preferred leftover bars from the fridge. So yummy! You can also freeze them for up to a month — just thaw at room temperature before serving.

Tips for the Best S’mores Cookie Crumb Bars

• For extra gooey pockets, add a little extra marshmallow fluff on top before baking.
• Don’t overbake — pull them from the oven when the edges are golden but the center still looks slightly soft.
• Chill before slicing for neat squares, or dig in warm for melty, messy perfection.

Whether you’re baking for a summer BBQ, cozy fall gathering, or just a Tuesday night treat, these Gluten-Free Vegan S’mores Cookie Crumb Bars will hit all the right notes — gooey, chocolatey, and oh-so-satisfying.

FAQs

Can I make these completely refined sugar–free?

Yes! Use coconut sugar in the dough, coconut sugar–sweetened chocolate chips, and a homemade aquafaba-based marshmallow fluff to keep the recipe free from refined sugar.

What can I use instead of vegan marshmallow fluff?

If you don’t have marshmallow fluff, you can use mini vegan marshmallows and press them gently into the dough. I have not made these bars with vegan marshmallows so I am not sure how melty they will get, but they should still be delicious! You could also make a homemade vegan fluff.

How do I make these bars more firm?

These bars are very soft and chewy. If you desire a firmer bar, bake for 3-5 minutes longer. You can also keep them stored in the fridge for a firmer bar.

Can I make them ahead of time?

Although these bars are best enjoyed the same day, they store well in an airtight container at room temperature for a up to 2 days before they start to dry out, or store in the fridge for up to 4 days. Store in the freezer for up to a month.

Why is my marshmallow fluff disappearing into the bars?

Marshmallow fluff can melt and blend into the dough if overmixed or baked too long. For visible gooey pockets, gently dollop it on top before baking and avoid spreading it too thin.

If you love these S’mores Cookie Crumb Bars, leave a comment down below in the comments section, as well as giving it a ⭐️⭐️⭐️⭐️⭐ rating  so that others can discover an easy, dairy-free s’mores dessert recipe! Tag me on Instagram, Facebook, or Pinterest if you make them!

Products Used In This Recipe

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