Ooey-Gooey Brownie S’mores: Campfire Flavor Without the Bug Spray

Ooey-Gooey Brownie S’mores Recipe: Campfire Flavor Without the Bug Spray

Cheeky Tagline: All the gooey s’mores drama, none of the mosquito bites.

If your sweet tooth has ever whispered, “I want brownies,” while your nostalgic little heart shouted, “No, I want s’mores,” this Ooey-Gooey Brownie S’mores Recipe is the dessert peace treaty you have been waiting for. It takes everything we love about classic campfire s’mores—melty marshmallows, crunchy graham crackers, and chocolate everywhere—and layers it over a pan of rich, fudgy brownies.

The best part? You do not need a tent, a fire pit, a camping permit, or that one questionable stick someone found behind the shed. These oven-baked brownie s’mores bring the campfire dessert flavor straight to your kitchen with a brownie mix shortcut, a quick broiler toast, warm hot fudge, and plenty of graham cracker crunch.

This is the kind of easy dessert recipe that feels right at home for movie night, backyard cookouts, bake sales, Father’s Day gatherings, summer parties, sleepovers, and those “I need chocolate immediately” evenings. If you love cozy, nostalgic desserts, you may also want to bookmark my Toasted Marshmallow Milkshake Recipe or make a retro dessert spread with my A&W Root Beer Float Recipe.

Why You’ll Love This Ooey-Gooey Brownie S’mores Recipe

This brownie s’mores dessert is what happens when a box of fudge brownies puts on its summer camp hoodie and decides to be the main character. It is rich, sticky, chocolatey, crunchy, and gloriously over-the-top in the best possible way.

• No campfire required: The oven and broiler do all the work, which means you can make s’mores brownies any time of year.
• Fast and family-friendly: This easy dessert starts with brownie mix, so it comes together quickly without losing that homemade, crowd-pleasing magic.
• Perfect for parties: These brownie s’mores bars are ideal for potlucks, cookouts, game night, birthday parties, and summer dessert tables.
• Chocolate-marshmallow perfection: You get fudgy brownies, golden toasted marshmallows, warm hot fudge, and crisp graham crackers in every bite.
• Easy to customize: Add peanut butter, caramel, crushed cookies, candy pieces, or homemade marshmallows for a fun dessert twist.

Basically, this is the dessert equivalent of everyone sitting around the fire laughing—except you get to enjoy it from the comfort of your kitchen, with air conditioning and zero smoky hair.

Ingredients for Brownie S’mores

These easy brownie s’mores bars keep things simple, sweet, and pantry-friendly. You only need a handful of ingredients to create a gooey chocolate marshmallow dessert that tastes like summer vacation baked into a pan.

• 1 box fudge brownie mix, 10.5 ounces: Use your favorite boxed brownie mix and prepare it according to package directions. A fudgy brownie mix works best because it stays rich and moist under the marshmallow topping.
• 1 bag large marshmallows, 1 pound: These toast beautifully under the broiler and create that classic s’mores pull. For an extra-special twist, try my Homemade Marshmallows Recipe.
• 1/4 cup plus 2 tablespoons hot fudge sauce, warmed: Warm fudge sauce drizzles smoothly and adds glossy, rich chocolate flavor.
• 8 graham crackers: Some are broken into planks for crunch, while the rest are crushed into crumbs for that true s’mores texture.

How to Make Ooey-Gooey Brownie S’mores

This recipe is delightfully simple, but the results look like you tried much harder than you did. That is my favorite kind of baking math.

Step 1: Preheat and Prepare the Pan

Preheat your oven to 375°F. Grease a 13×9-inch baking pan with nonstick cooking spray or line it with parchment paper for easier lifting and slicing.

Step 2: Make the Brownie Batter

Prepare the fudge brownie mix according to the package directions. Pour the batter into the prepared pan and spread it evenly into the corners.

Step 3: Bake the Brownies

Bake for 20 to 22 minutes, or until a toothpick inserted near the center comes out with moist crumbs. You want fudgy brownies, not dry little chocolate bricks of sadness.

Step 4: Add the Marshmallows

Remove the brownies from the oven and switch the oven setting to broil. Arrange the large marshmallows evenly over the hot brownies, covering the surface as much as possible.

Step 5: Broil Until Golden

Place the pan under the broiler for 1 1/2 to 2 minutes, watching closely, until the marshmallows are puffed and golden brown. Do not walk away. Marshmallows go from beautifully toasted to “call it rustic” very quickly.

Step 6: Add Hot Fudge and Graham Crackers

Drizzle the warm hot fudge sauce over the toasted marshmallows. Break half of the graham crackers into planks and crush the remaining graham crackers into crumbs. Sprinkle the crumbs over the top, then press the graham cracker planks gently into the marshmallow layer.

Step 7: Slice and Serve

Let the brownies cool slightly, then slice into squares. Serve warm for maximum gooey drama or at room temperature for a neater brownie bar.

Expert Tips for the Best Brownie S’mores Bars

A few tiny tricks make a big difference when you are working with brownies, marshmallows, and a broiler that apparently woke up choosing chaos.

• Use a fudgy brownie mix: Cake-style brownies can work, but fudgy brownies give this dessert the rich, gooey texture that makes it irresistible.
• Do not overbake the brownies: Pull them when the toothpick has moist crumbs. They will continue to set slightly as they cool.
• Watch the broiler like a hawk: Marshmallows can burn in seconds. Keep the oven light on and stay close.
• Warm the hot fudge first: A few seconds in the microwave makes it easier to drizzle evenly over the marshmallows.
• Use parchment for cleaner slices: Once slightly cooled, lift the brownies out of the pan and slice with a sharp knife.
• Spray your knife: A little nonstick spray helps cut through the sticky marshmallow layer.

If you are a brownie purist and want to skip the boxed mix, my Fudge Espresso Ultimate Brownies are a rich homemade option that would make an incredible base for this s’mores dessert.

Variations and Creative Ideas

Once you master the classic version, these s’mores brownies are basically a blank chocolate canvas. Let your dessert rebel flag fly.

Peanut Butter Brownie S’mores

Swirl peanut butter into the brownie batter before baking or drizzle melted peanut butter over the toasted marshmallows before adding the graham crackers.

Salted Caramel Brownie S’mores

Swap part of the hot fudge for caramel sauce and finish with a tiny pinch of flaky sea salt. My Homemade Caramel Sauce Recipe is perfect for this sweet-salty situation.

Cookies and Cream Brownie S’mores

Sprinkle crushed chocolate sandwich cookies over the marshmallows before broiling, then finish with graham cracker crumbs and fudge drizzle.

Holiday Brownie S’mores

Add peppermint chips for Christmas, candy eyes for Halloween, red and blue sprinkles for patriotic cookouts, or crushed toffee for Thanksgiving dessert boards.

Mini Brownie S’mores Bites

Make the brownies in a muffin tin, top each one with a marshmallow, broil briefly, and add a graham cracker square. They are adorable, party-friendly, and dangerously poppable.

Serving Suggestions for Brownie S’mores

These oven-baked s’mores brownies are best served warm, when the marshmallows are soft, stretchy, and ready to make everyone forget their manners for a minute.

• Serve with vanilla ice cream or toasted marshmallow ice cream.
• Add extra warm hot fudge or caramel drizzle just before serving.
• Pair with cold milk for the classic brownie experience.
• Serve alongside my Toasted Marshmallow Milkshake Recipe for a campfire-inspired dessert night.
• Make it a nostalgic party pairing with homemade A&W Root Beer Floats.
• Cut into small squares for bake sales, birthday parties, sleepovers, or backyard cookouts.

And honestly? A slightly warm brownie s’mores square eaten over the sink after everyone goes to bed is also a perfectly valid serving suggestion. I do not make the rules.

Make-Ahead and Storage Tips

Brownie s’mores are at their gooey best the day they are made, but leftovers are still wildly snackable.

• Room temperature: Store leftovers in an airtight container for up to 3 days.
• Reheating: Warm individual squares in the microwave for about 10 to 15 seconds to soften the marshmallow topping.
• Freezing: Freezing is not ideal because marshmallows can change texture, but you can freeze plain brownies before adding the s’mores topping.
• Make ahead: Bake the brownies earlier in the day, then add marshmallows, broil, and finish with fudge and graham crackers before serving.

Brownie S’mores FAQs

Can I make brownie s’mores with homemade brownies?

Absolutely. A boxed brownie mix keeps this recipe fast and easy, but homemade brownies make it extra rich. Try my Fudge Espresso Ultimate Brownies if you want a from-scratch brownie base.

Can I use mini marshmallows instead of large marshmallows?

Yes. Mini marshmallows work beautifully and create more even coverage. Just keep a close eye on them under the broiler because they toast quickly.

What if I do not have a broiler?

You can bake the marshmallow-topped brownies at a high temperature for a few extra minutes until the marshmallows soften and lightly brown. They may not get quite as toasted, but they will still be gooey and delicious.

Can I make these brownie s’mores gluten-free?

Yes. Use your favorite gluten-free brownie mix and gluten-free graham crackers. Always double-check labels on marshmallows and hot fudge sauce if you are cooking for someone with a gluten sensitivity.

How do I keep the marshmallows from burning?

Stay close to the oven, use the oven light, and rotate the pan if needed. The broiler is powerful, and marshmallows can go from golden to scorched very quickly.

Can I serve these cold?

You can, but warm or room temperature is best. Warm brownie s’mores have that classic melty campfire texture, while room-temperature bars slice more cleanly for parties and lunchbox treats.

More Cozy Recipes to Try Next

If this brownie s’mores recipe has you in a cozy, oven-baked mood, keep the comfort-food loop going. For dessert lovers, try my Homemade Marshmallows Recipe, Homemade Caramel Sauce Recipe, or Copycat Starbucks Salted Caramel Mocha Recipe.

And because every good dessert deserves a cozy dinner lead-in, here are a few casserole-style comfort food favorites to keep readers clicking around your site: Easy John Wayne Casserole Recipe, White Trash Casserole Recipe, Gluten Free French Toast Casserole Recipe, and your cozy collection of 125 Best Casseroles and One-Pot Meals.

Final Thoughts: S’more Brownie Points, Please

This Ooey-Gooey Brownie S’mores Recipe is the kind of dessert that makes people hover around the kitchen pretending they are “just checking.” It is rich, nostalgic, playful, and ridiculously easy to make. You get the magic of campfire s’mores layered over fudgy brownies, with warm hot fudge and crunchy graham crackers tying everything together.

Whether you make it for a summer cookout, family movie night, sleepover, potluck, or a regular Tuesday that needs chocolate intervention, this dessert brings the fun. No campfire, no bug spray, no smoky hoodie—just gooey marshmallow brownie bliss.

 

This recipe was originally published Sep 4, 2024, and updated June 7, 2026, with improved instructions, updates, and new photos.