S’mores Cookie Bars

Gooey marshmallow, rich chocolate and golden graham cracker goodness come together all in one dreamy bite with these s’mores cookie bars.

This easy-to-make dessert bar combines everything you love about a classic campfire treat that you can bake right in your kitchen, no firepit required. (But if you are interested in that, check out our family’s backyard fire pit makeover.)

The milk chocolate brings that melty richness you expect from a true s’mores experience, along with marshmallow creme for a luscious center and soft cookie dough creating a chewy base.

Equal parts nostalgic and irresistible, this dessert bar can be made all in one pan. They’re perfect for potlucks, birthday parties, summer gatherings or a cozy weekend indoors. They deliver comfort and flavor with minimal fuss. Let’s dig in.

What to serve with s’mores cookie bars

These cookie bars are rich, chocolatey and packed with classic s’mores flavor. To balance their sweetness with a bit of contrast, consider pairing them with a scoop of vanilla ice cream or a dollop of homemade whipped cream for contrast.

A glass of cold milk, hot coffee or even a creamy latte all make great beverage matches for the chewy texture and melty chocolate.

Doing a party spread? Serve these bars alongside other small-bite treats like chocolate-dipped strawberries, peanut butter cookies or fruit skewers. If you’re leaning into the nostalgic theme, offer hot cocoa with mini marshmallows on the side.

For a simple pop of tartness, pair them with nothing more than a scoop of fresh berries like raspberries or sliced strawberries. If you’re serving a crowd and want a more elaborate presentation, use them as the centerpiece of a full dessert board with graham crackers, chopped chocolate, mini marshmallows, sliced bananas and fresh blueberries.

Kitchen Equipment Needed

1. Mixing bowl
2. Electric mixer
3. 9 x 13 baking dish
4. Parchment paper

Ingredients needed to make s’mores cookie bars

Here’s a breakdown of what goes into this decadent dessert and why each ingredient matters.

• All-Purpose Flour: Provides structure for your chewy cookie bar base.
• Graham Cracker Crumbs: These add the signature s’mores flavor and a light, sandy texture.
• Baking Powder: Gives the bars a little lift so they’re not too dense.
• Salt: Balances sweetness and enhances all the other flavors.
• Unsalted Butter: Adds richness and helps with the chewy texture.
• Light Brown Sugar: Adds moisture, softness, and a deep caramel flavor.
• Eggs: Bind everything together and contribute to the structure and chewiness.
• Vanilla Extract: Adds warm flavor and aroma.
• Marshmallow Crème: This creates a gooey middle layer that mimics melted marshmallows (without the mess!).
• Milk Chocolate: Use chips or chopped Hershey bars for a flavor and consistency that melts perfectly between the layers.

Tips & tricks for the best s’mores cookie bars

Here are a few things I have learned over the years making these treats:

• Use parchment paper with a two-inch overhang so you can lift the bars out of the baking pan easily.
• Grease your spoon before spreading the marshmallow fluff—this prevents sticking and makes layering easier.
• Don’t overbake. The bars continue cooking as they cool, so pull them out when they’re golden brown around the edges.
• Cool completely before cutting. This helps the bars set and gives you clean, even slices.
• Customize your chocolate. If you like a darker flavor, swap in semi-sweet chocolate chips or even a few squares of dark chocolate.
• Try add-ins like mini marshmallows, chopped pecans, or a sprinkle of sea salt on top to mix up the flavor and texture.

Frequently asked questions about s’mores cookie bars

Below are some common questions and answers about this dessert, from substitutions to storage. If you have a question I haven’t covered, leave it in the comments. I will reply as soon as I can!

Can I use mini marshmallows instead of marshmallow creme?

Yes, you can use mini marshmallows for this recipe, but marshmallow creme is easier to layer and creates a smoother texture. Mini marshmallows may puff unevenly during baking, though the bars will still taste delicious.

How do I store leftover s’mores bars?

Store leftover s’mores bars in an airtight container at room temperature for up to three days. For longer storage, refrigerate them for up to a week or freeze for up to two months (see below).

What’s the best way to reheat them?

If you want that “just-baked” warmth and gooeyness, pop a slice in the microwave for about 10–15 seconds. You can also use a toaster oven or a warm regular oven (about 300°F) for a few minutes.

Are these bars freezer-friendly?

Wrap cooled bars in plastic wrap, then in foil and place them in a freezer bag. Thaw the bars in the fridge overnight or on the counter for a few hours before serving.

Can I make these s’mores cookie bars gluten-free?

You can make a gluten-free version of this recipe by substituting the all-purpose flour with a 1:1 gluten-free baking flour and using gluten-free graham cracker crumbs. Make sure all other ingredients (especially marshmallow creme and chocolate) are gluten-free certified.

More Grandma-approved recipes to try

If you enjoyed this recipe for s’mores cookie bars, I bet you’ll love these, too!

• Hello Dolly Bars
• Monster Cookies
• Homemade Fudge Brownies Recipe With Frosting
• Southern Chocolate Delight Recipe
• Strawberry Cheesecake Cookies