Triple Layer Mint Oreo Brownies are the perfect combination of rich chocolate, refreshing mint, and irresistible texture. With a fudgy brownie base, a smooth and fluffy minty filling, and a crunchy Oreo topping, these brownies are an absolute treat for any dessert lover. Whether you’re celebrating a holiday, need a pick-me-up, or just want to indulge in something decadent, this recipe delivers an unforgettable experience.
In this guide, we’ll explore everything you need to know about these minty delights, including expert tips, storage recommendations, and answers to frequently asked questions.
What Makes These Brownies Special?
These brownies go beyond your average dessert. Here’s what makes them truly stand out:
1. Triple Layer Perfection
Each bite delivers three unique textures:
- A rich, fudgy brownie base that is dense and packed with deep chocolate flavor.
- A fluffy, mint-infused marshmallow filling that adds a cool and refreshing contrast.
- A crunchy Oreo topping that gives every bite a delightful crunch.
2. The Perfect Balance of Chocolate and Mint
Some mint desserts can be overwhelming, but this recipe strikes the ideal balance. The subtle mint flavor enhances the chocolate without overpowering it, creating a dessert that’s bold yet smooth.
3. Ideal for Any Occasion
These brownies are a showstopper for holidays like St. Patrick’s Day, Christmas, or even just a weekend treat. Their eye-catching green layer also makes them great for parties and themed events.
Expert Tips for Perfect Brownies
Achieving the best texture and flavor requires attention to detail. Here are some expert tips to ensure your brownies turn out flawless:
1. Use High-Quality Chocolate
For the best results, use real baking chocolate instead of cocoa powder. A dark chocolate bar (at least 70% cocoa) will give your brownies a deep, rich flavor that complements the minty layer perfectly.
2. Don’t Overbake
The key to fudgy brownies is removing them from the oven just before they look fully done. They will continue to set as they cool, keeping that soft, dense texture intact. Overbaking will make them dry and crumbly.
3. Control the Mint Flavor
Mint extract is powerful—a little goes a long way. Always start with the recommended amount, and avoid adding extra unless you truly love strong mint flavors. Too much can make the brownies taste artificial or overpowering.
4. Swirl the Mint Mixture Carefully
When adding the minty marshmallow layer to the brownie batter, use a knife or toothpick to gently swirl it in. This creates a beautiful marbled effect and ensures the flavors blend evenly.
5. Let Them Cool Completely Before Frosting
Applying the frosting while the brownies are warm can cause it to melt and create a messy layer. For best results, allow the brownies to cool completely before adding the frosting and Oreo topping.
Serving Suggestions
These brownies are rich and indulgent, so a little goes a long way. Here are some fun ways to serve them:
- With Ice Cream: A scoop of vanilla or mint chocolate chip ice cream pairs perfectly with these brownies.
- With a Warm Beverage: A hot cup of coffee, cocoa, or peppermint tea enhances the mint-chocolate contrast.
- As a Holiday Dessert: Decorate with crushed candy canes for a festive Christmas twist.
- For Special Occasions: Cut them into bite-sized squares and serve them on a dessert platter for parties.
Storage and Make-Ahead Tips
Refrigeration vs. Freezing
These brownies can be stored in the refrigerator or freezer depending on how long you plan to keep them.
- Refrigerator: Store in an airtight container for up to 10 days. The cool temperature helps maintain the texture of the frosting and keeps the brownies fresh.
- Freezer: If you need to store them longer, place them in a freezer-safe container for up to 6 months. To serve, simply thaw them at room temperature for about 30 minutes.
How to Keep Them Soft and Moist
- If refrigerating, keep them in a sealed container to prevent the brownies from drying out.
- If stacking the brownies, place parchment paper between layers to prevent sticking.
- Allow refrigerated brownies to sit at room temperature for 15-20 minutes before serving for the best texture.
Ingredients:
Minty Marshmallow Swirl:
- 1 (7-ounce) jar Marshmallow Fluff
- ⅛ teaspoon mint extract (do not exceed)
- 8+ drops green food coloring (adjust for desired shade)
Fudgy Brownie Base:
- 4 ounces baking chocolate (or 9 squares of 72% dark chocolate)
- ¾ cup (1 ½ sticks) unsalted butter, melted
- 2 cups granulated sugar
- 3 eggs
- 1 teaspoon vanilla extract
- 2 tablespoons espresso or brewed coffee (optional)
- 1 cup all-purpose flour
- 12 Cool Mint Oreo Cookies, hand-crumbled
Luscious Frosting & Topping:
- ½ cup butter or margarine, softened
- 3 to 4 cups powdered sugar
- 1 teaspoon vanilla extract
- Splash of milk (if needed for consistency)
- ¾ cup white chocolate chips, melted
- 18 Cool Mint Oreo Cookies, hand-crumbled
Directions:
Step 1: Prepare the Pan & Preheat
Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with foil and coat with cooking spray.
Step 2: Make the Minty Swirl
In a bowl, combine Marshmallow Fluff, mint extract, and green food coloring. Stir until evenly mixed and set aside.
Step 3: Prepare the Brownie Batter
- In a large microwave-safe bowl, melt chocolate and butter together (about 90 seconds), stirring until smooth.
- Mix in sugar (it will look grainy—that’s okay).
- Add eggs and vanilla, stirring well. If using coffee, add it now.
- Gently mix in flour until just combined—don’t overmix!
- Fold in 12 crumbled Mint Oreos.
Step 4: Bake the Brownies
- Pour the brownie batter into the prepared pan.
- Drop ½ cup of the green marshmallow mixture onto the batter in spoonfuls, then swirl with a knife for a marbled effect.
- Bake for 23-25 minutes, until set. Do not overbake!
- Let the brownies cool completely (about 1 hour). If in a hurry, pop them in the freezer for 10 minutes.
Step 5: Make the Frosting & Topping
- Frosting: Whisk together butter, powdered sugar, vanilla, and a splash of milk until smooth and fluffy. (Or use store-bought frosting for convenience.)
- Melt white chocolate chips in a microwave (heat in 30-second intervals, stirring in between).
- Mix melted white chocolate into the remaining marshmallow mixture along with more green food coloring until the color is vibrant.
- Spread this frosting layer evenly over the cooled brownies.
Step 6: Add the Oreo Topping
- Sprinkle the top with 18 hand-crumbled Mint Oreos, pressing them gently into the frosting.
- Let the brownies set fully before slicing and serving.
Nutritional Breakdown (Per Serving):
- Calories: 705 kcal
- Carbohydrates: 126g
- Protein: 4g
- Fat: 22g (Saturated Fat: 13g)
- Cholesterol: 71mg
- Sodium: 113mg
- Sugar: 110g
- Fiber: 1g
Storage Tips:
- Refrigerator: Store in an airtight container for up to 10 days.
- Freezer: Keep in a sealed container for up to 6 months.
Enjoy these decadent, fudgy, and refreshingly minty brownies—perfect for any occasion!
Frequently Asked Questions
1. Can I Use a Boxed Brownie Mix Instead of Making Brownies from Scratch?
Yes! If you’re short on time, a boxed brownie mix works as a great shortcut. Just prepare the mix according to the package instructions, then follow the recipe for the mint filling, frosting, and Oreo topping.
2. What If I Can’t Find Mint Oreos?
If Mint Oreos aren’t available, you can use regular Oreos and add an extra drop of mint extract to the filling to enhance the flavor. You can also use Andes Mint Chocolates as an alternative.
3. Can I Make These Brownies Gluten-Free?
Yes! Simply swap the all-purpose flour for a gluten-free 1:1 baking flour, and use gluten-free chocolate sandwich cookies instead of Oreos.
4. Do I Have to Use Green Food Coloring?
No, the food coloring is purely for visual appeal. If you prefer to skip it, the flavor won’t be affected—your mint filling will just remain a natural white color.
5. Can I Substitute Marshmallow Fluff?
If you don’t have Marshmallow Fluff, you can make a homemade version by melting mini marshmallows with a splash of corn syrup until smooth. This will work as a substitute in the mint layer.
6. How Do I Cut These Brownies Cleanly?
For neat slices, follow these tips:
- Use a sharp knife and wipe it clean between cuts.
- Chill the brownies in the fridge before slicing for cleaner edges.
- Use a hot knife technique by running the knife under hot water, drying it, and then slicing.
Why You Should Try These Brownies Today
Triple Layer Mint Oreo Brownies are more than just a dessert—they’re an experience. From their rich chocolate base to the cool minty filling and crunchy Oreo topping, every bite is a perfect blend of flavors and textures.
Whether you’re a die-hard chocolate lover, a mint enthusiast, or just looking for a dessert that wows, these brownies check all the boxes. They are easy to prepare, store well, and make an incredible treat for any occasion.
So why wait? Gather your ingredients, preheat your oven, and treat yourself to the ultimate indulgence today!

Ultimate Guide to Triple Layer Mint Oreo Brownies
- Total Time: 2 hours (includes cooling time)
- Yield: 12-16 brownies
Description
These Decadent Triple Layer Mint Oreo Brownies are a chocolate lover’s dream! With a fudgy brownie base, a minty marshmallow swirl, luscious white chocolate frosting, and a crunchy Mint Oreo topping, these brownies are perfect for any occasion and sure to impress!
Ingredients
Minty Marshmallow Swirl:
- 1 (7-ounce) jar Marshmallow Fluff
- ⅛ teaspoon mint extract (do not exceed)
- 8+ drops green food coloring (adjust for desired shade)
Fudgy Brownie Base:
- 4 ounces baking chocolate (or 9 squares of 72% dark chocolate)
- ¾ cup (1 ½ sticks) unsalted butter, melted
- 2 cups granulated sugar
- 3 eggs
- 1 teaspoon vanilla extract
- 2 tablespoons espresso or brewed coffee (optional)
- 1 cup all-purpose flour
- 12 Cool Mint Oreo Cookies, hand-crumbled
Luscious Frosting & Topping:
- ½ cup butter or margarine, softened
- 3 to 4 cups powdered sugar
- 1 teaspoon vanilla extract
- Splash of milk (if needed for consistency)
- ¾ cup white chocolate chips, melted
- 18 Cool Mint Oreo Cookies, hand-crumbled
Instructions
-
Prepare the Pan & Preheat:
- Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with foil and coat with cooking spray.
-
Make the Minty Swirl:
- In a bowl, combine Marshmallow Fluff, mint extract, and green food coloring. Stir until evenly mixed and set aside.
-
Prepare the Brownie Batter:
- In a large microwave-safe bowl, melt chocolate and butter together (about 90 seconds), stirring until smooth.
- Mix in sugar (it will look grainy—that’s okay).
- Add eggs and vanilla, stirring well. If using coffee, add it now.
- Gently mix in flour until just combined—don’t overmix!
- Fold in 12 crumbled Mint Oreos.
-
Bake the Brownies:
- Pour the brownie batter into the prepared pan.
- Drop ½ cup of the green marshmallow mixture onto the batter in spoonfuls, then swirl with a knife for a marbled effect.
- Bake for 23-25 minutes, until set. Do not overbake!
- Let the brownies cool completely (about 1 hour). If in a hurry, pop them in the freezer for 10 minutes.
-
Make the Frosting & Topping:
- Frosting: Whisk together butter, powdered sugar, vanilla, and a splash of milk until smooth and fluffy. (Or use store-bought frosting for convenience.)
- Melt white chocolate chips in a microwave (heat in 30-second intervals, stirring in between).
- Mix melted white chocolate into the remaining marshmallow mixture along with more green food coloring until the color is vibrant.
- Spread this frosting layer evenly over the cooled brownies.
-
Add the Oreo Topping:
- Sprinkle the top with 18 hand-crumbled Mint Oreos, pressing them gently into the frosting.
- Let the brownies set fully before slicing and serving.
Notes
- Make sure not to overbake the brownies to keep the texture fudgy.
- The coffee in the brownie batter enhances the chocolate flavor, but it’s optional.
- Allow the brownies to set fully in the fridge before cutting to get clean slices.
- Prep Time: 20 minutes
- Cook Time: 23-25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American