These Triple Layer Fudgy Mint Oreo Brownies are a chocolate lover’s dream come true! Imagine a rich, fudgy brownie base topped with creamy mint frosting and finished with a crunchy layer of Oreo cookies. Each bite offers a perfect balance of deep chocolate, refreshing mint, and that familiar Oreo crunch that makes it extra special.
I love making these brownies when I want to impress friends or treat myself to something that feels a little fancy but isn’t hard to make. The layers come together easily, and I’m always surprised at how well the mint and chocolate play off each other. One tip I’ve learned is to chill the brownies before slicing so the layers stay crisp and neat — it makes serving a breeze!
For a fun way to serve these brownies, I like to cut them into small squares and share them with family during movie night or holiday gatherings. They always disappear fast, and I love hearing everyone’s “mmm” as they enjoy that peppermint Oreo crunch. These brownies bring a bit of joy and sweetness to any day, and honestly, they’re a treat that never gets old to me.
Key Ingredients & Substitutions
Unsalted Butter: Butter gives the brownies their rich and fudgy texture. If you want a dairy-free version, use vegan butter or coconut oil as a substitute.
Cocoa Powder: Unsweetened cocoa powder creates deep chocolate flavor. You can substitute with Dutch-processed cocoa for a milder taste but reduce baking soda slightly if using it.
Oreos: These add crunch and mint flavor in this recipe. If you can’t find mint Oreos, use regular Oreos and add extra peppermint extract to frosting for flavor.
Cream Cheese: This is key for the mint frosting, adding tangy creaminess. For a dairy-free option, try a vegan cream cheese or coconut-based spread.
Peppermint Extract: It gives the frosting a cool mint taste. Be careful—too much can be overpowering. You can also add a few drops of green food coloring for the classic mint look but it’s optional.
How Do You Get Perfectly Layered Brownies Without Mixing Layers?
Keeping the layers clean and distinct is key. Here’s what works well for me:
- Partially bake the first brownie layer: Bake the first layer with Oreos just until set but not fully done (about 10 minutes). This helps it hold its shape under the frosting.
- Cool slightly before frosting: Let the pan cool briefly before spreading the cream cheese frosting so it doesn’t melt and mix into the brownie layer.
- Gently add the second batter layer: Pour the remaining brownie batter gently across the frosting. You can spoon some on and smooth it lightly to avoid disturbing the mint layer.
- Press Oreos carefully on top: When adding the last Oreo layer, press them lightly so they stick but don’t sink deep.
- Chill before cutting: After baking and cooling, chilling the brownies helps the layers firm up, making clean slicing easy and preventing the layers from blending.
Equipment You’ll Need
- 9×13 inch baking pan – I like it because it’s the right size for even baking and easy to cut.
- Medium saucepan – perfect for melting butter and making the brownie batter.
- Mixing bowls – for preparing the frosting and mixing ingredients.
- Electric hand mixer or whisk – makes beating the frosting smooth and creamy.
- Parchment paper or non-stick spray – helps remove the brownies easily without sticking.
Flavor Variations & Add-Ins
- Swap mint Oreos for peanut butter Oreos for a nutty, rich twist.
- Mix in chopped nuts or crushed pretzels for extra crunch and salty flavor.
- Add a splash of vanilla or peppermint extract to the brownie batter for more flavor depth.
- Use dark chocolate chips instead of semi-sweet for a deeper chocolate taste.
Triple Layer Fudgy Mint Oreo Brownies
Ingredients You’ll Need:
For the Brownie Batter:
- 1 cup (2 sticks) unsalted butter
- 2 cups granulated sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- ½ teaspoon salt
- 1 cup semi-sweet chocolate chips
- 20 Oreo cookies, divided (about 15 for layering, 5 for topping)
For the Mint Cream Cheese Frosting:
- 1 package (8 oz) cream cheese, softened
- ¼ cup unsalted butter, softened
- 2 cups powdered sugar
- 2 teaspoons peppermint extract
- Green food coloring (optional)
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare, around 40 minutes to bake in two stages, plus at least 1 hour to chill before serving. Allowing the brownies to chill helps the layers set up nicely, making them easier to cut and enjoy.
Step-by-Step Instructions:
1. Prepare the Oven and Pan:
Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper or lightly grease it to prevent sticking.
2. Make the Brownie Batter:
Melt the butter in a medium saucepan over medium heat. Remove from heat and stir in the sugar until it’s well mixed. Beat in the eggs one at a time, stirring well after each addition. Then add the vanilla extract. In a separate bowl, sift together the flour, cocoa powder, and salt. Gradually combine the dry ingredients into the wet ingredients, mixing just until blended. Stir in the chocolate chips.
3. Start the First Brownie Layer:
Pour half of the brownie batter into your prepared pan, spreading it evenly. Layer 10 Oreo cookies evenly over this batter. Bake for about 10 minutes; the batter should be partly set but not fully baked.
4. Prepare the Mint Cream Cheese Frosting:
While the brownies bake, beat the softened cream cheese and butter in a bowl until smooth. Slowly add the powdered sugar and mix until well combined. Stir in the peppermint extract and a few drops of green food coloring if you like a minty color.
5. Add the Frosting and Second Batter Layer:
Take the pan out of the oven and carefully spread the mint frosting evenly over the partially baked brownie layer. Gently spread the remaining brownie batter over the frosting, smoothing it out evenly. Place the remaining 10 Oreos on top, pressing them lightly into the batter.
6. Bake the Final Layer:
Return the pan to the oven and bake for another 25-30 minutes. Check for doneness by inserting a toothpick near the center; it should come out with a few moist crumbs but not wet batter.
7. Cool and Chill:
Allow the brownies to cool completely in the pan on a wire rack. Once cooled, refrigerate for at least 1 hour to help the layers firm up and make cutting easier.
8. Serve and Enjoy:
Cut the brownies into squares and enjoy the fabulous combination of fudgy chocolate, cool mint frosting, and crunchy Oreo pieces!
Can I Use Frozen Butter for the Brownie Batter?
It’s best to use softened or melted butter rather than frozen. If your butter is frozen, thaw it completely before melting to ensure a smooth batter.
Can I Make These Brownies Ahead of Time?
Absolutely! You can bake the brownies a day ahead, refrigerate them, and then slice when ready to serve. Just be sure to chill them for an hour before cutting for clean layers.
How Should I Store Leftover Brownies?
Store any leftovers in an airtight container in the fridge for up to 4 days. Let them come to room temperature or warm slightly for the best texture before eating.
What If I Don’t Have Peppermint Extract?
No worries! You can substitute with a few drops of peppermint oil or omit it altogether for classic chocolate Oreo brownies. If you want mint flavor, you can also try adding crushed mint candies to the frosting.