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Sweet Potato-Smores Brownies

Sweet Potato-Smores Brownies bring luscious chocolate, marshmallows, and sweet potatoes all together in one treat--comfort at its best!
Keywords:s'mores brownies, sweet potato brownies, sweet potato s'mores brownies
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings 12 brownies
Calories359 kcal


For the Brownie Batter:

  • 1 18.3 oz or 520 g box of Chewy Fudge Brownies mix (I used Duncan Hines)
  • 4 large eggs at room temperature divided
  • 3/4 cup vegetable oil
  • 1-1/2 tablespoons pure vanilla extract divided
  • 1/4 cup water
  • 1/2 cup canned sweet potatoes drained and mashed
  • 1/2 cup  firmly packed light brown sugar
  • 1/3 cup unsalted butter softened
  • 1/2 cup granulated sugar
  • 1 teaspoon apple pie spice
  • 1 teaspoon  baking powder
  • 1 cup all-purpose flour
  • 2-1/2 to 3 cups  miniature marshmallows
  • Chocolate frosting recipe follows
  • 1-2 tablespoons Graham cracker crumbs plus small squares to decorate top of the brownies

For the Chocolate Frosting:

  • 2 tablespoons unsalted butter
  • 1-1/2 tablespoons  unsweetened cocoa
  • 1-1/2 tablespoons  milk
  • 1 cup powdered sugar
  • 1/4 teaspoon  vanilla extract


  • Preheat oven to 350° F for glass or metal pans, and 325° F for dark or non-stick pans.  Grease bottom of a 13- x 9-inch pan with cooking spray and set aside.
  • In a large bowl, with an electric mixer, beat brownie mix, 2 eggs, oil, 1 tablespoon vanilla, and water together on low speed until well blended (Please, do not over beat).   Pour half of the batter into the prepared pan and spread evenly.
  • Beat mashed sweet potatoes, brown sugar, butter, 1/2 tablespoon vanilla, and granulated sugar at medium speed with an electric mixer until light and fluffy. 
  • Add 2 eggs, one at a time, beating after each addition until just blended. Then, add the apple pie spice, baking powder, and flour to the sweet potato mixture, beating at low speed until just blended.
  • Spoon sweet potato mixture over brownie batter and spread even and gently; top with remaining brownie batter, spreading evenly.
  • Bake sweet potato-smores brownies for 30 to 35 minutes or until a wooden pick inserted in center comes out with a few moist crumbs. Remove sweet potato-smores brownies from oven to a wire rack and top with marshmallows.
  • Prepare Chocolate Frosting, and drizzle the hot frosting over sweet potato-smores brownies. Sprinkle Graham cracker crumbs on top and let cool completely. 
  • Decorate sweet potato-smores brownies with small Graham cracker squares and enjoy!

To prepare the Chocolate Frosting:

  • In a small saucepan, cook butter, cocoa, and milk over medium heat, whisking constantly, for about 2-3 minutes or until slightly thickened. 
  •  Then, remove from heat and whisk very well in powdered sugar and vanilla until smooth. Drizzle the hot frosting over the Sweet Potato-Smores Brownies.


Calories: 359kcal | Carbohydrates: 38g | Protein: 3g | Fat: 22g | Saturated Fat: 16g | Cholesterol: 73mg | Sodium: 34mg | Potassium: 114mg | Sugar: 28g | Vitamin A: 1080IU | Vitamin C: 0.2mg | Calcium: 40mg | Iron: 1mg
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