
This super simple S'mores Brownies recipe transforms a classic campfire treat into a decadent dessert you can enjoy year-round. The combination of fudgy brownies, toasted marshmallows, and classic s'mores toppings creates an irresistible treat that brings back summer memories no matter the season.
I first made these for my family during a rainy weekend when the kids were disappointed about canceling our backyard campout. Now they actually prefer these brownies to traditional s'mores!
Ingredients
- Ghirardelli brownie mix: 2 boxes provides the perfect fudgy base that holds up well to the toppings
- Mini marshmallows: 2 cups create that classic toasted marshmallow layer and melt more evenly than large ones
- Graham crackers: 1 package adds the essential crunch and honey flavor that defines a true s'more
- Chocolate bars: 2 1.55 ounce bars broken into pieces melt slightly into the warm marshmallows creating pockets of chocolate goodness
Step-by-Step Instructions
- Prepare the brownie base:
- Follow package directions to mix and bake brownies according to the box instructions. Using quality brownie mix like Ghirardelli results in a fudgy texture that complements the s'mores toppings perfectly.
- Crush the graham crackers:
- While brownies bake, place graham crackers in a plastic bag and gently crush them into small pieces. Aim for a mix of fine crumbs and small chunks for varied texture in every bite.
- Add the s'mores toppings:
- Once brownies are fully baked, remove from oven and switch to broiler setting. Evenly distribute mini marshmallows across the entire surface of the warm brownies, then sprinkle with crushed graham crackers.
- Toast to perfection:
- Place pan under the broiler for just 2 to 3 minutes, watching constantly to prevent burning. The marshmallows should puff up and turn golden brown, providing that authentic toasted flavor.
- Finish with chocolate:
- Remove from oven and immediately press chocolate pieces into the hot marshmallow layer. The residual heat will soften the chocolate without completely melting it. Let cool for 30 minutes before cutting into squares.

The mini marshmallows are truly the star of this recipe. I discovered that using mini instead of large marshmallows creates the perfect ratio of toasty exterior to gooey interior. One summer evening, my youngest declared these even better than campfire s'mores because "you get brownie too!"
Storage Tips
These s'mores brownies stay fresh in an airtight container at room temperature for 2 to 3 days. For longer storage, separate layers with parchment paper to prevent sticking. While they can be refrigerated, the marshmallow layer will become firmer, so I recommend bringing them to room temperature before serving for the best texture experience.
Make Them Your Own
While the classic s'mores combination is hard to beat, you can customize these brownies in endless ways. Try using different chocolate varieties like dark chocolate or peanut butter cups instead of milk chocolate bars. Add a sprinkle of cinnamon to the graham cracker layer for a Mexican chocolate twist. For extra indulgence, drizzle with caramel sauce before serving.
Perfect For Any Occasion
These s'mores brownies are incredibly versatile for entertaining. Cut them into larger squares for a casual family dessert or smaller bite sized pieces for party platters. They make excellent additions to bake sales, potlucks, and summer gatherings. I've even served them slightly warm with a scoop of vanilla ice cream for an elevated dessert that impressed dinner guests.
Frequently Asked Questions
- → How do you toast marshmallows for S’mores Brownies?
After baking the brownies, sprinkle marshmallows on top and broil for 2-3 minutes until golden brown. Watch carefully to prevent burning.
- → What type of chocolate works best for S’mores Brownies?
Milk chocolate bars are classic for a traditional flavor, but you can also use dark chocolate for a richer taste or white chocolate for a unique twist.
- → Can I use homemade brownie mix instead of a box mix?
Absolutely! You can prepare your favorite homemade brownie recipe and follow the same steps to add marshmallows, graham crackers, and chocolate.
- → What is the best way to crush the graham crackers?
Place the graham crackers in a resealable plastic bag and crush them with a rolling pin or your hands for the perfect crumb size.
- → How should I store leftover S’mores Brownies?
Store the brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.