Gooey, chocolatey, and full of nostalgic campfire flavor, these S’mores Brownies are the ultimate indulgent treat! With a buttery graham cracker crust, rich fudgy brownie layer, and toasted marshmallow topping, they capture everything you love about classic s’mores—without the need for a fire pit. Perfect for parties, bake sales, or a sweet family dessert everyone will rave about!
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Why You’ll Love This Recipe
Three Delicious Layers – Graham cracker crust, rich brownies, and melty marshmallows.
Ultimate Chocolate Fix – Fudgy brownies meet classic s’mores flavors.
Fun and Nostalgic – Brings all the cozy campfire vibes to your kitchen.
Easy to Make – Simple steps, showstopping result.
Perfect for Sharing – Great for gatherings, parties, and holidays.
Ingredients You’ll Need
For the Graham Cracker Crust:
- 1½ cups graham cracker crumbs
- 6 tbsp unsalted butter, melted
- ¼ cup granulated sugar
For the Brownie Layer:
- 1 box (18 oz) brownie mix (plus ingredients listed on box – typically eggs, oil, water)
OR make homemade brownies with: - ½ cup unsalted butter, melted
- 1 cup granulated sugar
- 2 large eggs
- 1 tsp vanilla extract
- ⅓ cup unsweetened cocoa powder
- ½ cup all-purpose flour
- ¼ tsp salt
- ¼ tsp baking powder
For the Marshmallow Topping:
- 3 cups mini marshmallows
Optional Add-Ins:
- ½ cup chocolate chips or chunks in the brownie batter
- Extra graham cracker pieces and chocolate squares for garnish
Tools You’ll Need
9×13 inch baking dish
Mixing bowls
Spatula
Measuring cups and spoons
Hand whisk or electric mixer
Oven
Step-by-Step Instructions
Step 1: Preheat and Prep
- Preheat your oven to 350°F (175°C).
- Line a 9×13 inch baking dish with parchment paper or grease it well.
Step 2: Make the Graham Cracker Crust
- In a medium bowl, combine graham cracker crumbs, melted butter, and sugar.
- Press the mixture firmly and evenly into the bottom of the prepared pan.
- Bake for 8-10 minutes until lightly golden.
- Set aside to cool slightly while you prepare the brownie layer.
Step 3: Prepare the Brownie Batter
- Make brownie batter according to box instructions, or for homemade:
- In a large bowl, whisk melted butter and sugar together.
- Add eggs and vanilla, whisking until smooth.
- Stir in cocoa powder, flour, salt, and baking powder just until combined.
- (Optional) Fold in chocolate chips or chunks for extra fudgy goodness.
Step 4: Assemble and Bake
- Pour the brownie batter over the cooled graham cracker crust and spread evenly.
- Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
- Remove from the oven but keep it on.
Step 5: Add the Marshmallow Topping
- Immediately scatter the mini marshmallows evenly over the top of the hot brownies.
- Return the pan to the oven and bake for 3-5 minutes, just until marshmallows are puffed and lightly golden.
- Watch closely to prevent burning!
Step 6: Cool, Slice, and Serve
- Let the brownies cool completely in the pan for easier slicing.
- For clean cuts, lightly grease your knife or wipe it between cuts.
- Garnish with extra graham cracker crumbs or chocolate chunks if desired.
Tips for the Best S’mores Brownies
Don’t Overbake – Brownies should be slightly fudgy in the center for best texture.
Use Fresh Marshmallows – They puff and toast better than older, sticky marshmallows.
Line the Pan – Parchment paper helps lift brownies out easily for perfect slices.
Toast Marshmallows Carefully – They go from golden to burnt quickly!
Let Cool Before Cutting – Warm marshmallows can stick; cooling helps firm them up.
Serving Suggestions
Serve with a cold glass of milk for the ultimate treat.
Top with a drizzle of chocolate or caramel sauce for extra decadence.
Pair with fresh strawberries or raspberries for a fruity contrast.
Bring them to BBQs, bonfires, or picnics—they’ll be the first dessert gone!
How to Store & Reheat
Storing:
- Store in an airtight container at room temperature for up to 3 days.
- For longer storage, refrigerate for up to 5 days.
Freezing:
- Freeze individual brownies (without marshmallow topping if possible) for up to 2 months.
- Thaw at room temperature before serving.
Reheating:
- Microwave a brownie for 10-15 seconds to make it warm and gooey again.
Frequently Asked Questions
- Can I use jumbo marshmallows?
Yes! Just slice them in half so they don’t overwhelm the topping. - Can I make these ahead of time?
Absolutely! Bake them the day before and store covered at room temperature. - Can I add peanut butter or Nutella?
Yum! Swirl a few tablespoons into the brownie batter before baking for a tasty twist. - How do I prevent marshmallows from getting too hard after baking?
Cover the pan loosely with foil after the marshmallows set if storing overnight to keep them soft.
Final Thoughts
These S’mores Brownies are everything you love about the classic campfire treat, layered into a decadent, gooey, chocolatey dessert bar. Perfect for satisfying your sweet tooth year-round, they’re easy to make, fun to serve, and absolutely unforgettable.
Bake a batch today and relive those campfire memories—no campfire required!
Preparation Time: 15 minutes
Cooking Time: 35 minutes
Cuisine: American
Nutritional Information (Per Serving):
Calories: 360 | Protein: 4g | Carbohydrates: 49g | Fat: 17g | Fiber: 2g | Sodium: 180mg

S’mores Brownies
- Total Time: 50 minutes
Description
Gooey, chocolatey, and full of nostalgic campfire flavor, these S’mores Brownies are the ultimate indulgent treat! With a buttery graham cracker crust, rich fudgy brownie layer, and toasted marshmallow topping, they capture everything you love about classic s’mores—without the need for a fire pit. Perfect for parties, bake sales, or a sweet family dessert everyone will rave about!
Love decadent desserts like this? Subscribe now and get more irresistible baking ideas delivered straight to your inbox every week!
Ingredients
For the Graham Cracker Crust:
-
1½ cups graham cracker crumbs
-
6 tbsp unsalted butter, melted
-
¼ cup granulated sugar
For the Brownie Layer:
-
1 box (18 oz) brownie mix (plus ingredients listed on box – typically eggs, oil, water)
OR make homemade brownies with: -
½ cup unsalted butter, melted
-
1 cup granulated sugar
-
2 large eggs
-
1 tsp vanilla extract
-
⅓ cup unsweetened cocoa powder
-
½ cup all-purpose flour
-
¼ tsp salt
-
¼ tsp baking powder
For the Marshmallow Topping:
-
3 cups mini marshmallows
Optional Add-Ins:
-
½ cup chocolate chips or chunks in the brownie batter
-
Extra graham cracker pieces and chocolate squares for garnish
Instructions
Step 1: Preheat and Prep
-
Preheat your oven to 350°F (175°C).
-
Line a 9×13 inch baking dish with parchment paper or grease it well.
Step 2: Make the Graham Cracker Crust
-
In a medium bowl, combine graham cracker crumbs, melted butter, and sugar.
-
Press the mixture firmly and evenly into the bottom of the prepared pan.
-
Bake for 8-10 minutes until lightly golden.
-
Set aside to cool slightly while you prepare the brownie layer.
Step 3: Prepare the Brownie Batter
-
Make brownie batter according to box instructions, or for homemade:
-
In a large bowl, whisk melted butter and sugar together.
-
Add eggs and vanilla, whisking until smooth.
-
Stir in cocoa powder, flour, salt, and baking powder just until combined.
-
(Optional) Fold in chocolate chips or chunks for extra fudgy goodness.
Step 4: Assemble and Bake
-
Pour the brownie batter over the cooled graham cracker crust and spread evenly.
-
Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
-
Remove from the oven but keep it on.
Step 5: Add the Marshmallow Topping
-
Immediately scatter the mini marshmallows evenly over the top of the hot brownies.
-
Return the pan to the oven and bake for 3-5 minutes, just until marshmallows are puffed and lightly golden.
-
Watch closely to prevent burning!
Step 6: Cool, Slice, and Serve
-
Let the brownies cool completely in the pan for easier slicing.
-
For clean cuts, lightly grease your knife or wipe it between cuts.
-
Garnish with extra graham cracker crumbs or chocolate chunks if desired.
Notes
Don’t Overbake – Brownies should be slightly fudgy in the center for best texture.
Use Fresh Marshmallows – They puff and toast better than older, sticky marshmallows.
Line the Pan – Parchment paper helps lift brownies out easily for perfect slices.
Toast Marshmallows Carefully – They go from golden to burnt quickly!
Let Cool Before Cutting – Warm marshmallows can stick; cooling helps firm them up.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Cuisine: American