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s'mores brownies cut into squares and served with a glass of milk

Peanut Butter S'mores Brownies

Rachel Riesgraf
Fudgy, chewy brownies swirled with peanut butter and baked over a sweet graham cracker crust, then topped with toasted marshmallows, melty chocolate, and more graham cracker crumbs. Peanut Butter S’mores Brownies are the perfect summer treat!
5 stars
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Course Dessert
Servings 12 large brownies

Ingredients
  

  • 9-10 graham crackers
  • ¾ cup butter, melted (1½ sticks)
  • ¼ cup vegetable oil
  • 1 cup granulated sugar
  • 1 cup packed brown sugar
  • 4 eggs
  • 1 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1 cup unsweetened cocoa powder
  • ½ teaspoon salt
  • ½ cup peanut butter, smooth or crunchy
  • 2 chocolate bars, roughly chopped (about ½ cup)
  • 1-2 cups miniature marshmallows

Instructions
 

  • Preheat oven to 350° F. Line 9x13 inch baking dish with parchment paper, allowing some parchment to hang over the edges of the pan.

Graham cracker crust

  • Arrange the graham crackers in a single layer in the bottom of the baking dish, breaking some crackers to fill the space.

Peanut butter brownie

  • In a large bowl, whisk together melted butter, vegetable oil, and sugar for 1 minute. Add eggs and vanilla extract and whisk until combined and lighter in color.
  • Add the flour, cocoa powder, salt and ¼ cup of chopped chocolate to the bowl with the wet ingredients. Using a sturdy spoon, fold in the dry ingredients until just combined.
  • Pour the batter over the graham crackers and spread into an even layer. Drop dollops of peanut butter over the batter, then use a butter knife to swirl the peanut butter.
  • Bake for 25-30 minutes, or until a toothpick inserted into the center comes out mostly clean with some crumbs, but not wet batter.

S'mores toppings

  • Top with the mini marshmallows, remaining ¼ cup of chopped chocolate, and 1-2 crumbled graham crackers.
  • Position a rack in the top ⅓ of the oven, and broil the brownies for about 1 minute, or until the marshmallows are golden brown (watch closely as they can burn quickly).
  • Remove from oven and let cool for 30 minutes. Use the edges of the parchment paper to lift the brownies from the baking dish, then slice and enjoy! Tip: Spray your knife with cooking oil to prevent the marshmallows from sticking to the knife when slicing!

Nutritional information is automatically calculated by a third party software and is only an estimate, not a guarantee. This information is provided as courtesy, and you are solely responsible for all decisions related to your health.

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