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Easy S'Mores Brownies from Scratch Recipe

S'mores Brownies from scratch are the ultimate indulgence for any dessert lover. They feature a rich chocolate brownie base packed with chunks of peanut butter cups and a graham cracker crust. Topped with peanut butter chips and gooey marshmallows, these brownies are a decadent twist on a classic campfire treat that will satisfy any sweet tooth.
Prep Time18 minutes
Cook Time37 minutes
Course: Dessert
Cuisine: American, casual
Servings: 12
Calories: 536kcal

Ingredients

Crust

  • 1 cup finely crushed graham cracker crumbs
  • ½ cup granulated sugar
  • 6 tablespoons butter melted

Brownies

  • 1 ½ cups all-purpose flour
  • ½ unsweetened cocoa powder sifted
  • 1 teaspoon baking powder
  • 1 cup 2 sticks butter, softened
  • 2 cups granulated sugar
  • ¼ cup milk
  • 2 teaspoons vanilla extract
  • 3 eggs
  • 1 cup chopped peanut butter cups
  • 1 cup peanut butter chips
  • 10- ounce bag mini marshmallows

Instructions

  • Preheat your oven to 350F and spray a 9x13-inch baking dish with non-stick cooking spray.
  • Combine graham cracker crumbs, ½ cup granulated sugar, and 6 tablespoons melted butter in a medium mixing bowl. Mix well, then pour the mixture into the prepared baking dish and press evenly to form the crust layer. Set aside.
  • Whisk together the flour, cocoa powder, and baking powder in another medium mixing bowl; set aside.
  • In a large mixing bowl, use an electric mixer on medium speed to cream together butter and sugar until light and fluffy.
  • Add milk and vanilla extract to the bowl, and mix well.
  • Add eggs one at a time, mixing between each addition.
  • Gradually add the dry mixture to the wet mixture until just combined. Fold in chopped peanut butter cups.
  • Pour the brownie batter over the graham cracker layer in the baking dish.
  • Bake the brownies at 350F for 35-40 minutes, until a toothpick inserted into the center comes out clean.
  • Remove the brownies from the oven and set the oven to broil.
  • Sprinkle peanut butter chips over the hot brownies, then top with marshmallows.
  • Place the pan of brownies in the oven under the broiler and broil for 1-2 minutes until the marshmallows are toasted. Be careful not to burn them! Keep a close eye on the brownies and remove them from the oven when the marshmallows are golden brown on top.
  • Let the brownies cool for at least 10 minutes before slicing them into 12 bars.
  • Enjoy your delicious peanut butter cup s'mores brownies!

Notes

Notes:
  • I used regular-sized Reese's cups, chopped them into smaller pieces, and added them to the brownie batter. However, if preferred, mini Reese's cups could be used instead.
  • To make 1 cup of crushed graham cracker crumbs, you will need approximately 1 sleeve of graham crackers. If you have whole graham crackers, crush them in a plastic bag using a rolling pin or a food processor until you get the desired amount.
  • When cutting the brownies, it's best to do it while they're still warm and while the marshmallows are soft.
Tip: Spraying a knife with non-stick cooking spray before cutting makes it easier to slice through the sticky marshmallow layer. You can also use a plastic knife or dip the knife in warm water and wipe it dry between each cut.

Nutrition

Calories: 536kcal | Carbohydrates: 79g | Protein: 4g | Fat: 24g | Saturated Fat: 14g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 97mg | Sodium: 290mg | Potassium: 67mg | Fiber: 1g | Sugar: 58g | Vitamin A: 716IU | Vitamin C: 0.004mg | Calcium: 48mg | Iron: 1mg