Layers of fudgy chocolate, graham crackers and perfectly toasted marshmallows make amazing S’mores Brownies Recipe. One bite and you will be hooked. It is so gooey, and you get to enjoy all the flavor of s’mores!

Close up image of a slice of s'mores brownie on a white plate.
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Once you make this S’mores Brownies Recipe, you will wonder why you didn’t make this sooner. The secret is the brownie mix and it gives the bars the most decadent layer of chocolate. It’s an easy brownie recipe everyone will enjoy.

I have been making s’mores desserts for years including S’mores Rice Krispie Treats and S’mores Poke Cake.

Why We Love This Recipe

You get all of that yummy s’more’s flavor that is so amazing in one amazing little brownie. These brownies start with a graham cracker crust, then brownie is baked and then topped with roasted marshmallows.

We love brownies but this recipe takes brownies to the next level. No need for a campfire when you can make these ooey gooey brownies.

Close up image of S'mores Brownies being stretched

Ingredients

  • Graham Cracker Crumbs. You can buy store bought or make your own crumbs.
  • Butter. It needs to be melted.
  • Brownie Boxed Mix. Use any brand you prefer.
  • Mini Marshmallows. The mini size makes this perfect for the bars.
  • Additional Graham Crackers. These are broken into pieces.

Find the complete list of ingredients at the bottom of the page.

How to Make S’mores Brownies

  • Step 1. Prepare the oven and pan. Preheat the oven to 350 degrees. Line the pan with foil, leaving some overhang, and then butter the foil or use cooking spray and set aside.
Bowl of graham cracker crumbs combined with sugar and butter.

Step 2. Stir together the graham cracker crumbs and sugar in a medium bowl mixing the ingredients well. Then add the melted butter. Whisk together until blended.

Graham cracker crumbs pressed into baking dish.

Step 3. Press the graham cracker mixture into the prepared pan. Press into an even layer. Then bake for about 15 minutes, or until golden brown.

Brownie batter in bowl.

Step 4. Make the fudgy brownies according to the box instructions in a large mixing bowl.

Batter poured on crust.

Step 5. Then pour the brownie layer over the cooked graham cracker layer, spreading it into an even layer with a rubber spatula. Bake the brownies according to the directions.

Marshmallows on pan broiled.

Step 6. Switch the oven to broil. Pour the bag of mini marshmallows on the brownies. Keep a close eye on them so they don’t burn.

S'mores bars cut and served on a spatula.

Step 7. As soon as the pan comes out of the oven, top the marshmallow layer with the graham cracker pieces. Finally, cool and serve. Cut with a sharp knife to get clean cuts.

Storage

Store brownies in an airtight container at room temperature.

Can You Freeze This Recipe?

To freeze these brownies, once they are cut into squares wrap each individual brownie in plastic wrap. Then place in a freezer safe container. The brownies will stay fresh for up to 3 months.

Pro Tips

  • Baking Dish – This recipe is perfect in a 9×13 baking dish.  It really makes the brownies the perfect thickness. You can also use a square 8-inch pan for a thicker brownie.
  • Line Pan – You definitely want to line your pan with foil or parchment paper. The chocolate and marshmallows can get a little sticky and messy. The foil will help make clean up much easier.
  • Use Disposable Pan – Now, I will tell you another tip that I often do if I really want zero cleanup. I use a disposable pan. It’s nice to just be able to toss the dish.
  • Graham Cracker Crust – It is also helpful to use a food processor to get the graham crackers really fine. However, if you don’t have a food processor, you can also crush the graham cracker sheets in a ziplock bag with a rolling pin.
  • Make Homemade Brownies – You can make homemade brownies with cocoa powder if you prefer. I love Easy One Bowl Brownies.
  • Toppings. Add semi-sweet chocolate chips, milk chocolate chips or peanut butter chips on top. Try Sea Salt on top for a sweet and salty combination.

More Brownie Recipes

More Easy S’mores Desserts

You will love this new recipe.  Let us know once you make them and how the s’mores brownies turned out for you. Leave a comment and star rating.

S’mores Brownies Recipe

4.80 from 29 votes
Layers of fudgy chocolate, graham crackers and perfectly toasted marshmallows make amazing S'mores Brownies Recipe. One bite and you will be hooked. It is so gooey, and you get to enjoy all the flavor of s'mores!
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 12
Cuisine American
Course Dessert
Calories 386

Ingredients

  • 3 cups graham cracker crumbs
  • ¼ cup up granulated sugar
  • ¾ cup butter melted
  • For the brownie part:
  • 1 box of brownie mix – for the 9×13 size prepared according to directions
  • 1 bag mini marshmallows
  • Additional graham crackers broken into pieces
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Instructions

  • Preheat oven to 350 degrees F. Butter a 9×13-inch baking pan. Line the pan with foil, leaving some overhang, and then butter the foil; set aside.
  • Combine the graham cracker crumbs, sugar , mixing well. Add the melted butter and, using a fork, toss until the entire mixture is moist. Dump the graham cracker mixture into the prepared baking pan, pressing it into an even layer. Bake for about 15 minutes, or until golden brown.
  • Meanwhile, prepare your brownie recipe. Pour the brownie batter over the cooked graham cracker crust, spreading it into an even layer. Bake the brownies according to the directions.
  • As soon as the brownies come out of the oven, switch the oven to broil. Pour the bag of mini marshmallows onto the brownies, covering it in an even layer. Pop the pan back in the oven for a few minutes. Keep a close eye on them – you want them to start to char so you get that s’mores flavor, but don’t want to completely burn them.
  • As soon as the pan comes out of the oven, top the marshmallow layer with the pieces of graham cracker, pressing down slightly so that the pieces of graham cracker get nestled into the marshmallow.
  • Cool completely and then cut into squares. Store at room temperature in an airtight container.

Nutrition Facts

Calories 386kcal, Carbohydrates 58g, Protein 3g, Fat 17g, Saturated Fat 8g, Cholesterol 31mg, Sodium 328mg, Potassium 41mg, Fiber 1g, Sugar 34g, Vitamin A 355IU, Calcium 20mg, Iron 2mg

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About the Author

Hi, I’m Carrie. Welcome to Desserts on a Dime!

I’m on a mission to help you create delicious desserts on a budget and do not require a ton of time. Together, we are going to make something sweet that the entire family will love!

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