Oreo Brownies With Marshmallows Recipe

This Oreo Brownies recipe starts with a basic brownie recipe and then adds in crunchy Oreos and ooey gooey marshmallows. As if this isn’t enough, top off these Oreo Brownies with yet more Oreos and marshmallows!


  • 4 ounces unsweetened chocolate; coarsely chopped
  • 3/4 cup butter, cubed
  • 1 1/4  cups granulated sugar
  • 3 eggs, lightly beaten
  • 1 teaspoon pure vanilla extract
  • 1/4 teaspoon kosher salt
  • 1 cup all-purpose flour
  • 12 Oreos, coarsely chopped (leave 2 tablespoons aside for the topping)
  • 1 cup mini marshmallows, divided use


  1. Preheat oven to 350 degrees F. Line an 8×8 inch baking pan with foil and spray with nonstick cooking spray.
  2. In a large bowl, microwave the chocolate and butter at medium (50% power) for 3-4 minutes or until butter is melted, stirring every 30 seconds. Whisk until chocolate is melted.
  3. Stir in sugar, eggs, vanilla and salt until thoroughly combined. Gradually add in flour and stir until just combined.
  4. Fold in Oreos and 3/4 cup of marshmallows until combined. Pour batter into prepared pan.
  5. Sprinkle the reserved 2 tablespoons of Oreos and 1/4 cup marshmallows on the top.
  6. Bake for 30-35 minutes, do not over bake.
  7. Remove to cooling rack. Allow to cool completely before cutting.
  8. Notes:
  9. The 1/4 cup of marshmallows that are scattered on top will get slightly crunchy. If you are not fond of this textural element, simply fold all of the marshmallows into the matter.
  10. For minty brownies, substitute Mint Oreos for regular Oreos. (Omit marshmallows if desired).
  11. Storage:
  12. These brownies are best served the day they are made; however, they we will store for up to two days in an airtight container.

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