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4.50 from 2 votes

Halloween Oreo Brownies

These brownies are a chocolate lovers dream! Rich brownies filled with Oreos and topped with a chocolate fudge frosting. Make these anytime of the year, but I used Halloween Oreos and candy pumpkins for garnish!
Prep Time10 minutes
Cook Time25 minutes
Course: Dessert
Keyword: brownies, chocolate, frosting, fudge, halloween, oreo
Servings: 12 slices
Author: Emily - My Messy Kitchen

Ingredients

For the brownies:

  • 1 cup salted butter melted
  • 2 tbsp vegetable oil
  • 1 ¼ cup granulated sugar
  • 1 cup light brown sugar
  • 4 eggs room temperature
  • 2 tsp vanilla extract
  • ½ tsp salt
  • 1 cup all-purpose flour
  • 1 cup cocoa powder I prefer Ghirardelli but you can use whatever brand you prefer
  • 1 cup bittersweet chocolate chips I prefer Ghirardelli but you can use whatever brand you prefer
  • 20 Oreos

For the frosting:

  • ½ cup salted butter melted
  • 2 cups powdered sugar
  • 1 tsp vanilla extract
  • 2-3 tbsp milk room temperature
  • cup cocoa powder

For garnish:

  • 22 candy pumpkins
  • ½ cup crushed Oreos

Instructions

For the brownies:

  • Preheat the oven to 350° and grease and line a 8×12 or 9×11 baking pan with parchment paper. In a large bowl combine melted butter, oil, granulated and brown sugar. Whisk to combine. Add in vanilla and eggs and beat for 30 seconds, until the batter becomes a lighter brown.
  • Sift in flour, cocoa powder and salt. Mix lightly until just combined. Gently fold in the chocolate chips. Pour half of the batter into the prepared pan and spread evenly. Evenly layer on the Oreos and top with the rest of the batter. Bake for 25 – 30 minutes or until the center no longer jiggles. If you want fudgy brownies, do not over bake! If you prefer cakey brownies, bake for 5-8 minutes longer. Remove from the over and let cool completely before frosting. Once the brownies are cooled, make the frosting.

For the frosting:

  • In a large bowl combine the melted butter, vanilla extract and powdered sugar. Beat on medium speed until frosting is smooth and creamy, about 1 minute. Remove about ⅓ cup of the frosting and dye green.
  • To the stand mixer beat in the cocoa powder and add in 1 tablespoon of milk at a time until you reach the desired consistency. 

For assembly:

  • Once the brownies have completely cooled spread on the fudge frosting. Top with crushed Oreos. Add green frosting to a piping bag fitted with a small round tip and pipe swirled vines on top. Add candy pumpkins, slice and serve!