S’mores Brownies
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These S’mores Brownies are what happens when a campfire favorite meets a fudgy, chocolate-loaded dessert. With layers of graham crackers, gooey brownies, and toasted marshmallows, they’re easy to make and even easier to disappear.
S’mores have clearly become a bit of a thing around here. Between my Mini S’more Pies, S’mores Cookies, S’mores Dip, and S’mores Pops, it’s safe to say I’m not running out of ways to keep that chocolate-marshmallow combo going anytime soon.
Why You’ll Love These S’mores Brownies
- Starts with a boxed mix → quick and easy
- Layers of graham cracker, brownie, and toasted marshmallow
- Gooey, chocolatey, and just messy enough to feel fun
- Perfect for summer, potlucks, or anytime you want a crowd-pleaser
TidyMom tip: Corner pieces always have the best marshmallow situation.
What You’ll Need
- Brownie mix (plus ingredients listed on the box)
- Graham crackers
- Mini marshmallows
- Chocolate candy bar
How to Make S’mores Brownies
1. Prep the pan & batter
Grease or line an 8×8 pan and prepare the brownie mix according to the package.
2. Build the base
Arrange graham crackers in the bottom of the pan, then pour the brownie batter over the top.
3. Bake
Bake just until set in the center—slightly underbaked is perfect.
4. Add topping & broil
Top with marshmallows and graham cracker pieces, then broil until marshmallows are golden and puffy (watch closely!).
5. Finish & cool
Sprinkle chopped chocolate over the warm brownies so it melts, then let cool before slicing.
TidyMom tip: Spray your knife lightly before slicing to keep the marshmallow from sticking.
Tips for the Best S’mores Brownies
- Use a metal pan → it bakes more evenly and prevents overbaked edges
- Don’t overbake → fudgy is what you want
- Mini marshmallows melt and toast more evenly
- Keep a close eye under the broiler—it happens fast
TidyMom tip: Turn on the oven light and stay close—this is not the moment to walk away.
Storage
Store brownies in an airtight container:
- Room temperature: 3–4 days
- Refrigerator: up to 5–6 days
Freezing
Wrap individually or separate layers with parchment so they don’t stick.
Thaw overnight in the refrigerator.
Frequently Asked Questions
Yes—any brand will work, just stick with an 18-ounce box for best results.
No, but it adds an extra layer of melty chocolate that really takes these over the top.
You can, but a metal pan is best. Glass holds heat longer and can lead to overbaked edges, so you may need to adjust the bake time slightly.
Make sure they’re fully cooled before slicing, and lightly spray your knife for cleaner cuts.
Final Thoughts
These S’mores Brownies bring all the nostalgia of a campfire treat into an easy, bake-and-share dessert. Rich, gooey, and layered with texture, they’re the kind of recipe people ask for after one bite.
S'mores Brownies
Easy S’mores Brownies made with a boxed mix, layered with graham crackers, gooey marshmallows, and melted chocolate for a nostalgic, crowd-pleasing dessert.
Ingredients
- 18 ounce boxed brownie mix (I use Ghirardelli)
- 1/3 cup vegetable oil ,use quantity listed on box
- 1/3 cup water ,use quantity listed on box
- 1 large egg, room temp ,use quantity listed on box
- 2 graham cracker sheets
- 3 ounce chocolate bars, chopped , use as much chocolate to your liking
- 2 cups mini marshmallows
Instructions
- Preheat your oven to 350°F and spray an 8x8 baking pan with nonstick cooking spray or line with parchment paper.
- Prepare the brownie mix according to the box instructions, then set it aside.
- Line the bottom of the prepared baking pan with graham crackers. You may have to break some of them to make them fit.
- Pour the prepared brownie mix over the top.
- Bake for 33-35 minutes.
- Remove the brownies (they won’t be done baking yet) and turn the oven to broil.
- Top the under-baked brownies with marshmallows and graham cracker pieces.
- Broil for 1-2 minutes just until the marshmallows turn a light golden brown and start to expand.
- Remove the brownies from the oven and sprinkle them with the chopped chocolate bar. It will melt from the heat of the brownies.
- Allow them to cool for at least 1 hour before cutting into pieces and serving.
Notes
Tips
- Slightly underbake for a soft, fudgy texture.
- Use a metal pan for more even baking.
- Watch closely while broiling—marshmallows brown quickly.
Storage
Store in an airtight container at room temperature for up to 4 days or refrigerate for up to 6 days.
Freezing
Wrap individually or layer with parchment. Thaw overnight in the refrigerator.
Nutrition Information:
Yield: 9 Serving Size: 1Amount Per Serving: Calories: 340Total Fat: 13gSaturated Fat: 4gUnsaturated Fat: 9gCholesterol: 24mgSodium: 196mgCarbohydrates: 53gFiber: 1gSugar: 9gProtein: 4g
Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin, and freshness of ingredients used and are just estimates. We encourage, especially if these numbers are important to you, to calculate these on your own for most accurate results.
Hi there, I'm Cheryl!
As a wife, mom, and caffeine enthusiast, my journey has taken me from bustling mornings with my family to sharing delicious recipes, home care tips, and heartfelt decorating insights with wonderful readers like you. My love for baking, photography, and tidiness shines through every post I craft. Dive into my world and discover the art of homemaking, one tidy moment at a time. Read more...
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