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Triple Layer Fudgy Mint Oreo Brownies
5 from 12 votes

Triple Layer Fudgy Mint Oreo Brownies

These Triple Layer Fudgy Mint Oreo Brownies feature a fudgy chocolate brownie base mixed with Cool Mint Oreos, topped with a mint-flavored marshmallow filling swirled into the batter, and finished with a white chocolate and Oreo frosting layer. The combination creates a rich, minty, and multi-textured dessert.

Prep Time
30 mins
Cook Time
25 mins
Cooling Time
2 hrs
Total Time
2 hrs 55 mins
Servings: 18
Calories: 705 kcal
Course: Baked Goods
Cuisine: American

Ingredients

Filling
  • 1 7- ounce marshmallow fluff jar
  • ⅛ teaspoon mint extract
  • 8 green food coloring or until desired shade of green is reached, drops+
  • 1 batch of brownies – see ingredients below in step 2 or use 1 box of brownie mix – make according to directions on the box by adding the water, oil, eggs
  • brownies
Brownies
  • 4 ounces baking chocolate used 9 squares of TJ’s 72% chocolate bar
  • ¾ cup butter melted (1 1/2 sticks, unsalted
  • 2 cups granulated sugar
  • 3 egg
  • 1 teaspoon vanilla extract
  • 2 tablespoons espresso optional, or brewed coffee
  • 1 cup all-purpose flour
  • 12 Oreo cookies hand-crumbled, Cool Mint flavor
  • Frosting and Topping
Frosting and Topping
  • ½ cup butter softened, or margarine
  • 3 to 4 cups powdered sugar
  • 1 teaspoon vanilla extract
  • milk if necessary for consistency, splash
  • ¾ cup white chocolate chips melted
  • 18 Oreo cookies hand-crumbled, Cool Mint flavor

Instructions

    Cup of Yum
  1. Preheat oven to 350°F. Line a 9×13-inch pan with foil and spray it with cooking spray.
Filling:
  1. In medium bowl, stir together marshmallow fluff, mint extract* (be very careful and do not use more than this unless you love mint; a little bit of mint goes a very long way), 4 drops of food coloring, or until light green is achieved; set aside.
Brownies:
  1. Microwave chocolate and butter in large microwave-safe bowl for 90 seconds or until butter is melted. Stir until chocolate is completely melted.
  2. Stir in sugar (it will seem very granular, this is okay).
  3. Stir in eggs and vanilla. If adding espresso or coffee, add it now.
  4. Stir in flour until just combined, do not overmix.
  5. Hand-crumble 12 Oreos over the bowl and fold them in.
  6. Spread brownie batter in prepared pan.
  7. Drop about 1/2 cup of green filling mixture onto brownie batter and reserve the remainder. Gently pull a table knife through the batter in S-shaped curves for a swirled design.
  8. Bake 23 to 25 minutes or until brownies are set, taking care not to overbake. (Some people’s ovens and taste preferences may require 25-30 minutes, bake until brownies are done and to your liking).
  9. Cool completely, about 1 hour, or put the pan into the freezer for 10 minutes if you’re rushed.
Frosting and Topping:
  1. While brownies are cooling, make vanilla frosting by whisking together the butter, confectioners’ sugar, vanilla, and milk as needed until smooth and fluffy, or beat with an electric mixer. Optionally use 1 cup store-bought vanilla frosting – or use entire can if you want a thicker final green layer.
  2. In another small microwave-safe bowl, melt the white chocolate chips (microwave on high for 30 seconds; stir and microwave 30 seconds longer; stir until smooth, taking care not to scorch it as white chocolate scorches easily).
  3. Add the melted white chocolate chips and the vanilla frosting to the reserved green minty marshmallow mixture.
  4. Stir in 4 drops+ food coloring, or until light green color is reached, and spread over cooled brownies.
  5. Sprinkle with 18 hand-crumbled Oreo Cookies, slightly pressing them into the green mixture.
  6. Allow top layer to set fully before slicing and serving.

Notes

  • If Mint Oreos are unavailable, increase mint extract in the filling slightly to maintain flavor.
  • You may simplify by using your favorite boxed brownie mix and store-bought vanilla frosting instead of making from scratch.
  • These brownies are rich and best enjoyed in moderation.

Nutrition Information

Serving 1 Calories 705kcal (35%) Carbohydrates 126g (42%) Protein 4g (8%) Fat 22g (34%) Saturated Fat 13g (65%) Polyunsaturated Fat 8g (47%) Cholesterol 71mg (24%) Sodium 113mg (5%) Fiber 1g (4%) Sugar 110g (220%)

Nutrition Facts

Serving: 18 Serving

Amount Per Serving

Calories 705

% Daily Value*

Serving 1
Calories 705kcal 35%
Carbohydrates 126g 42%
Protein 4g 8%
Fat 22g 34%
Saturated Fat 13g 65%
Polyunsaturated Fat 8g 47%
Cholesterol 71mg 24%
Sodium 113mg 5%
Fiber 1g 4%
Sugar 110g 220%

* Percent Daily Values are based on a 2,000 calorie diet.