These Triple Layer Fudgy Mint Oreo Brownies are a chocolate lover’s dream come true, packed with rich, fudgy brownie, creamy mint filling, and crunchy Oreo cookies all in one bite. The combination of deep chocolate flavor with a refreshing hint of mint and the satisfying texture from the Oreos makes these brownies stand out from the usual.
I love making these brownies when I want something a little extra special but still super easy to share with friends or family. I usually keep a stash in the fridge because they’re perfect cold—plus, that minty layer feels so cool and refreshing alongside the dense brownie. Pro tip: try slicing them small for gatherings; everyone keeps reaching for another piece!
When I first baked these, they quickly became a favorite at home and at parties. The way the three layers come together feels like a fun treat that’s both nostalgic and new. It’s like having a brownie, candy bar, and cookie all in one, and honestly, I’m already planning when to make them again next!
Key Ingredients & Substitutions
Unsalted Butter: Butter gives these brownies a rich, fudgy texture and great flavor. You can swap it for coconut oil for a dairy-free version, but expect a slightly different taste.
Mint Oreo Cookies: These are key for that refreshing minty crunch. If you can’t find mint Oreos, regular Oreos with a bit of added mint extract or crushed Andes mints work well.
Mint Oreo Filling: Scraping out the filling adds an extra layer of creamy mint flavor. If you’re short on time, you could carefully remove some whole cookies and layer them instead.
Cocoa Powder: Use unsweetened cocoa for deep chocolate flavor. Dutch-processed cocoa also works but may alter baking chemistry slightly.
Mint Extract: This is optional but boosts the mint taste. Start with a small amount as it’s quite strong.
How Can You Keep the Oreo Layers Intact While Baking?
One challenge is making sure the Oreos don’t sink or shift as you layer the batter. Here’s how to keep the layers nice and neat:
- Spread the first half of the batter evenly and gently; don’t overmix or press too hard.
- When adding the Oreo filling and cookies, place them carefully without pushing down.
- Pour the remaining batter slowly over the cookies using a spatula or spoon, spreading gently to cover without disturbing the cookie layer.
- Using a sturdy spatula helps to keep the layers distinct and prevents the cookies from moving.
- Chilling the batter briefly before adding each Oreo layer can help it hold its shape better during assembly.
Equipment You’ll Need
- 9×9 inch baking pan – I like this size because it gives the brownies a nice thickness and they bake evenly.
- Parchment paper or cooking spray – makes removing the brownies and layering easier.
- Large mixing bowls – for mixing the brownie batter and preparing the layers without mess.
- Whisk or electric mixer – helps combine the ingredients smoothly and thoroughly.
- Spatula – perfect for spreading the batter evenly and gently layering the Oreo filling and cookies.
- Measuring cups and spoons – for precise ingredients, especially with the mint extract and cocoa powder.
Flavor Variations & Add-Ins
- Use dark or semi-sweet chocolate chips instead of mini chips for a richer flavor.
- Swirl in a tablespoon of caramel or peanut butter before baking for added richness.
- Make it gluten-free by swapping the regular Oreos for gluten-free cookies and using a gluten-free flour blend.
- Add a dash of peppermint extract to the brownie batter for a more intense mint flavor if you love peppermint.
How to Make Triple Layer Fudgy Mint Oreo Brownies
Ingredients You’ll Need:
- 1 cup (2 sticks) unsalted butter
- 2 cups granulated sugar
- 4 large eggs
- 1 tsp vanilla extract
- 1 cup all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 1/2 tsp salt
- 1 cup mini dark chocolate chips or chopped dark chocolate
- 1 cup mint Oreo cookie filling (scraped from about 20 mint Oreos)
- 20 mint Oreo cookies for layering and topping
- 1/4 tsp mint extract (optional, for extra mint flavor)
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare and 30-35 minutes to bake. Then, allow the brownies to cool completely before slicing, which takes another 30 minutes or so. For firmer brownies, chilling in the refrigerator for about an hour is recommended.
Step-by-Step Instructions:
1. Prepare Your Pan and Batter:
First, preheat your oven to 350°F (175°C). Line a 9×9 inch pan with parchment paper or lightly grease it to prevent sticking. Then, melt your butter in a medium saucepan over low heat. Take it off the heat and whisk in the sugar until the mixture is smooth. Let it cool a bit so the eggs don’t cook when added.
2. Mix Your Ingredients:
Add the eggs one by one to the butter and sugar mix, whisking well after each. Stir in the vanilla extract and mint extract if you’re using it for extra flavor. Meanwhile, sift the flour, cocoa powder, and salt into a separate bowl. Gradually stir these dry ingredients into the wet mixture, just until combined. Finally, fold in the chocolate chips gently.
3. Build the Layers:
Spread half of the brownie batter evenly into your prepared pan. Carefully dollop half of the mint Oreo cookie filling over the batter and spread it gently with a spatula. Lay half of the mint Oreo cookies evenly on top of this layer. Then, gently spread the remaining brownie batter over the Oreos, being careful not to displace them.
4. Finish Topping and Bake:
Add the rest of the Oreo filling in small dollops on top of the batter and swirl lightly with a knife to create a marbled effect. Finally, place the remaining whole mint Oreos spaced evenly across the top. Bake the brownies for 30 to 35 minutes. You’ll know they’re done when a toothpick inserted in the center comes out with moist crumbs (but not wet batter).
5. Cool, Slice, and Enjoy:
Let the brownies cool completely in the pan before slicing them into squares. For an even better texture, pop them in the fridge for about an hour before serving. Enjoy these rich, fudgy brownies with a creamy minty Oreo surprise in every bite!
Can I Use Regular Oreos Instead of Mint Oreos?
Yes, you can! The brownies will still be delicious, but you’ll miss the refreshing mint flavor. To mimic the mint taste, add a few drops of mint extract to the batter or use crushed peppermint candies.
How Should I Store Leftover Brownies?
Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to a week. Chilling actually helps keep the mint layer firm and enhances the fudgy texture.
Can I Freeze These Brownies?
Absolutely! Wrap individual brownies tightly in plastic wrap and place them in a freezer-safe container for up to 3 months. Thaw overnight in the fridge before serving for the best texture and flavor.
What If I Don’t Have Mint Extract?
No worries! The mint Oreo cookies add plenty of mint flavor on their own. If you want extra mintiness, try adding crushed peppermint candies or a small amount of peppermint oil as a substitute.