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S’mores Brownies takes your favorite boxed mix up a notch with graham crackers, mini marshmallows, and Hershey’s chocolate bar pieces. Easy to make and loved by all!

S'mores Brownies with graham crackers, mini marshmallows, and Hershey's chocolate bars in a pan, cut into squares with a few missing, and other brownies separated from the rest.

S’mores Brownies

S’mores are an all American campfire treat made famous by the Girl and Boy Scouts of America. The graham cracker sandwich with a chocolate bar and toasted marshmallow is so delicious that everyone wants “some more.”

Our family can’t get enough of that triple threat combination with recipes like my S’mores Cookie Bars, S’mores Pizza, and S’mores Cereal Bars to name a few.

So I figured why not put that graham cracker, marshmallow, and chocolate combo on a brownie, and S’mores Brownies were created.

Close up of S'mores Brownies on a platter.

Boxed Mix with a Twist

The best part about this recipe is how ridiculously easy it is. If you can make a boxed mix of brownies, break up some graham crackers and chocolate bars, and sprinkle some mini marshmallows, you are golden.

Gourmet brownies couldn’t be any easier! If you want to skip the box mix, try my 13×9 brownie recipe.

Top view of melted marshmallows and chocolate bars with graham cracker pieces on top of baked brownies.

S’more Brownies Ingredients

You only need seven ingredients to make this easy brownie recipe:

Ingredients for S'mores Brownies: Brownie Mix, Eggs, Oil, Water, Chocolate Bars, Graham Crackers, and Mini Marshmallows.
  1. Brownie Mix — big enough for a 13×9-inch pan; typically labeled “family size”
  2. Eggs
  3. Oil
  4. Water
  5. Graham Crackers – broken or cut into bite-size pieces
  6. Miniature Marshmallows
  7. Hershey’s Milk Chocolate Bars, broken into squares

Make the Brownies

  • Combine the brownie mix, eggs, oil, and water as directed on the box of brownies. (FYI: We love Duncan Hines Dark Chocolate Fudge Brownie Mix. Be sure to follow the directions for “cakey” brownies since they will be topped with stuff.)
  • Then pour the batter into a greased 13×9-inch baking pan.
  • Bake at 350 degrees Fahrenheit for 20 minutes or until just about done baking. i.e. a toothpick comes out just slightly wet or with a few moist crumbs when inserted into the center.
Two image collage. Top image: Dry brownie mix in a bowl with eggs, water, and oil on the side. Bottom image: Brownie batter being poured into a greased 13x9-inch pan.

Add the S’mores Toppings and Bake Again

  • Once the brownies are just under-baked, pull them out of the oven and sprinkle them with graham cracker pieces and mini marshmallows. Then top the graham crackers and marshmallows with the chocolate squares.
  • Return pan to oven and bake at 350˚F for an additional 5 minutes, until the marshmallows have puffed up and the chocolate has melted.
Two image collage. Top image: Baked brownies with some graham cracker pieces and mini marshmallows. Bottom image: Baked brownies completely covered with marshmallows, graham crackers, and chocolate bar pieces.

Cutting and Serving

The hardest part of this recipe is cutting and serving these smores brownies, IF you do it while they are warm.

Of course you can wait for the brownies to cool completely, but aren’t s’mores meant to be eaten warm?! (YES!) Just know they will be a gooey mess. (Just the way we like it!)

TO CUT S’MORES BROWNIES WHILE WARM: Spray a knife with cooking spray and then cut the brownies. Keep spraying the knife as needed to prevent sticking.

Keep leftovers tightly covered in the pan at room temperature up to 3 days. Note: Graham crackers will soften with storing.

Pan of gooey smores brownies cut into squares.
Close up side view of dark chocolate brownies topped with smores ingredients: graham crackers, marshmallows, and chocolate.

S’mores Recipes

Close up of S'mores Brownies on a platter.

S'mores Brownies

Prep Time: 15 minutes
Cook Time: 25 minutes
Total Time: 40 minutes
Yield: 20 brownies

S'mores Brownies takes your favorite boxed mix up a notch with graham crackers, mini marshmallows, and Hershey's chocolate bar pieces. Easy to make and loved by all!

Ingredients

  • 1 box brownie mix, for a 13x9-inch pan ("Family Size")
  • 2 eggs (or as written on box for "cakey" brownies)
  • 1/3 cup oil (or as written on box)
  • 1/3 cup water (or as written on box)
  • 6 graham cracker sheets, cut or broken into bite-size pieces
  • 2 cups miniature marshmallows
  • 12 snack-size Hershey's Milk Chocolate Bars, broken into squares*

Instructions

  1. Preheat oven to 350 degrees Fahrenheit. Combine the brownie mix, eggs, oil, and water as directed on the box for "cakey" brownies. Then pour the batter into a greased 13×9-inch baking pan and spread evenly.
  2. Bake at 350˚F for 20 minutes or until just about done baking. i.e. a toothpick comes out just slightly wet or with a few moist crumbs when inserted into the center.
  3. Once the brownies are just under-baked, pull them out of the oven and sprinkle them with graham cracker pieces and mini marshmallows. Then top the graham crackers and marshmallows with the chocolate squares.
  4. Return pan to oven and bake at 350˚F for an additional 5 minutes, until the marshmallows have puffed up and the chocolate has melted.
  5. To cut while warm, spray a knife with cooking spray and then cut the brownies. Keep spraying the knife as needed to prevent sticking. OR wait for brownies to cool completely before cutting into 5x4 rows for 20 brownies.
  6. Store brownies in the pan covered tightly with plastic wrap or foil for up to 3 days. Note: Graham crackers will soften with storing.

    Notes

    • May substitute 2-3 regular size Hershey's bars or 2 cups (one 10-12oz bag) of chocolate chips for the snack size bars.

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    Nutrition Information:
    Yield: 20 Serving Size: 1/20
    Amount Per Serving: Calories: 94Total Fat: 6gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 20mgSodium: 26mgCarbohydrates: 9gFiber: 0gSugar: 6gProtein: 1g

    This data was provided and calculated by Nutritionix, and is an estimation only.

    author: Amber | Dessert Now Dinner Later / Cuisine: American / Category: Bars and Brownies
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