If you love gooey, chocolate-stuffed, marshmallow-loaded treats, these S'mores Bars are the ultimate dessert of your dreams! Imagine all the nostalgic, melty, graham cracker magic of classic s'mores, but in a ridiculously easy, crowd-pleasing bar form.

They're buttery, chewy, and perfectly golden, with toasted marshmallow and rich chocolate in every single bite. You don't even need a campfire or special equipment-just your oven and a craving for something unforgettable!

Whether you're hosting a summer party, packing lunchbox treats, or need a quick weeknight dessert, these S'mores Bars are a must-try. They come together fast, are super kid-friendly, and will disappear in record time.

This recipe is inspired by my childhood camping trips-but I promise, they're even better indoors!

Soft, gooey s'mores bars with golden marshmallow and melted chocolate

Why You'll Love This Recipe

Classic s'mores flavor-no campfire required!
Super easy and fast-ready in under 45 minutes
Perfect for parties, potlucks, and bake sales
Irresistibly gooey texture with melty chocolate and toasted marshmallows

Key Ingredients for S'mores Bars

See recipe card below for full list of measurements, ingredients, and instructions.

Graham Cracker Crumbs

Graham crackers give these bars their signature toasty flavor and crisp, buttery base. You can crush whole crackers in a food processor or buy pre-made crumbs to save time. If you're gluten-free, swap in gluten-free graham-style cookies-just make sure they're finely ground for best results.

Marshmallows

Marshmallows are the star of the show, bringing all the gooey, stretchy, golden-brown goodness you love. Mini marshmallows work best for even distribution, but you can chop up large ones if that's what you have. Vegan marshmallows are a great swap if needed.

Milk Chocolate Bars

Classic s'mores are made with milk chocolate, and it melts beautifully here. Use full-size Hershey's bars for that nostalgic flavor, but feel free to use chocolate chips or even chopped dark chocolate for a richer twist. Semi-sweet is delicious if you prefer less sweetness.

Unsalted Butter

Butter binds the graham cracker layer and adds rich flavor. Melted butter makes it easy to stir everything together. You can use margarine for a dairy-free version, though the flavor will be slightly different.

Brown Sugar

Brown sugar adds a hint of caramel notes and helps create a soft, chewy texture in the graham cracker dough. Light or dark brown sugar both work-dark will bring a deeper molasses flavor.

Instructions for S'mores Bars

See recipe card below for full list of measurements, ingredients, and instructions.

Preheat and Prepare Your Pan

Start by preheating your oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving a little overhang on the sides for easy removal. This makes lifting out and cutting the bars so much easier!

Mix the Graham Cracker Dough

In a large bowl, stir together the graham cracker crumbs, flour, baking powder, and salt. Add the melted butter, brown sugar, granulated sugar, egg, and vanilla, then mix until a soft dough forms. The mixture should resemble thick cookie dough and smell wonderfully buttery.

Press and Layer

Press about two-thirds of the dough evenly into the bottom of your prepared pan. Arrange chocolate bar pieces evenly over the dough, and sprinkle the marshmallows in a generous layer on top. Break the remaining dough into small pieces and scatter it over the top-don't worry if some marshmallow and chocolate peek through.

Bake to Golden Gooey Perfection

Bake for 23-27 minutes, until the top is golden brown and the edges are set. The marshmallows should be puffed and lightly toasted. Let the bars cool completely in the pan before lifting out and slicing-this helps them set and makes for neater slices.

Recipe Variations

Peanut Butter Lovers

Swirl ¼ cup of creamy peanut butter over the chocolate before adding the marshmallows for an extra-rich, nutty twist. Peanut butter chips or chopped peanut butter cups work great too!

Gluten-Free Option

Substitute gluten-free graham crackers and your favorite 1:1 gluten-free flour blend for the all-purpose flour. The texture will be a little softer but just as delicious.

Dark Chocolate S'mores Bars

For a grown-up spin, use dark chocolate bars or semi-sweet chocolate chips instead of milk chocolate. The deeper chocolate flavor is absolutely irresistible.

S'mores Blondie Bars

Craving a more cookie-like bar? Add ½ cup of white chocolate chips or butterscotch chips to the dough for a fun flavor twist.

Vegan S'mores Bars

Replace the butter with vegan margarine, use vegan marshmallows, and stick with your go-to egg replacer. Be sure to check that your chocolate is dairy-free as well!

Serving Suggestions

Serve these S'mores Bars slightly warm for maximum gooeyness-just microwave a slice for 10 seconds if they've cooled. They pair perfectly with a scoop of vanilla ice cream or a cold glass of milk. For parties, arrange them on a platter and sprinkle with extra crumbled graham crackers for a rustic, campfire-inspired look.

Storage and Reheating

Store leftover S'mores Bars in an airtight container at room temperature for up to 3 days, or in the fridge for up to 1 week. To reheat, microwave an individual bar for 10-15 seconds for that gooey, fresh-from-the-oven experience. For longer storage, wrap bars tightly and freeze for up to 2 months-thaw at room temperature or gently warm in the microwave.

Frequently Asked Questions About S'mores Bars (FAQ)

Q: Can I double this recipe for a 9x13-inch pan?

A: Absolutely! Just double all the ingredients and bake in a 9x13-inch pan. The bake time will increase slightly-check at 28-32 minutes.

Q: Can I use chocolate chips instead of bars?

A: Yes-semi-sweet or milk chocolate chips melt beautifully and are easy to sprinkle. About 1 cup equals the amount of chocolate in the original recipe.

Q: Why do my bars fall apart when I slice them?

A: Make sure the bars cool completely before slicing. The marshmallow and chocolate need time to set up. For neatest cuts, refrigerate the bars first and use a sharp knife.

For even more creative s'mores-inspired treats, check out these gooey s'mores cookies from Sally's Baking Addiction or learn about the history of s'mores at Serious Eats! If you love easy, crowd-pleasing bars, you'll also enjoy our classic Blondies recipe.

Ready to bring all the campfire fun right to your kitchen? These S'mores Bars are everything you love about summer, in one dreamy, gooey bite. Give this recipe a try, and don't forget to leave a comment or rating below-I love hearing how they turn out for you!

Why You'll Love This Recipe