Triple Layer Mint Brownies always show up when I want something bold and a little playful. Imagine a quiet Sunday afternoon, windows cracked open, and the smell of chocolate drifting through the kitchen. Then that cool mint note hits, bright and fresh. These brownies feel festive, fun, and just a little over the top in the best way.
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Why These Triple Layer Mint Brownies Stand Out
Triple Layer Mint Brownies bring together fudgy chocolate, fluffy mint marshmallow, and a creamy mint frosting in one pan. First, you bite into rich brownie. Then, you taste that cool mint swirl. Finally, crushed Cool Mint Oreos add crunch on top.
Because of those layers, each square feels special. However, the steps stay simple and clear. You do not need fancy tools. Instead, you just need a bowl, a mixer, and a little patience while everything sets.
Also, these brownies taste even better the next day. As a result, they work beautifully for parties, holidays, or make ahead desserts. The mint flavor grows deeper after resting, and the texture becomes even fudgier.
Ingredients You’ll Need for Triple Layer Mint Brownies
These Triple Layer Mint Brownies use pantry basics plus a few fun extras. Meanwhile, each layer builds flavor and texture.
Mint Marshmallow Layer
For the mint layer, grab one 7 ounce jar marshmallow fluff. Then add ⅛ teaspoon mint extract and about 8 drops green food coloring. Stir until evenly tinted.
Use mint extract carefully. It tastes strong, so start small. You can always add a tiny bit more if needed.
Fudgy Brownie Base
For the brownie base, melt 4 ounces baking chocolate with ¾ cup unsalted butter. Then mix in 2 cups granulated sugar.
Next, add 3 eggs, 1 teaspoon vanilla extract, and 2 tablespoons brewed coffee if you like deeper chocolate flavor. After that, gently stir in 1 cup all purpose flour. Finally, fold in 12 crushed Cool Mint Oreos.
Frosting and Topping Layer
For the frosting, beat ½ cup softened butter with 3 to 4 cups powdered sugar. Then add 1 teaspoon vanilla and a small splash of milk until smooth.
After that, blend in ¾ cup melted white chocolate and the remaining mint mixture. Meanwhile, keep 18 crushed Cool Mint Oreos ready for topping.

How to Make Triple Layer Mint Brownies Step by Step
Making Triple Layer Mint Brownies feels like building a dessert tower. However, each step flows easily into the next.
Prepare the Mint Marshmallow Mixture
First, preheat your oven to 350°F. Then line a 9×13 inch pan with foil and lightly grease it.
Next, stir marshmallow fluff, mint extract, and green food coloring until smooth. Set it aside.
Make the Fudgy Brownie Batter
Meanwhile, melt the baking chocolate and butter together until smooth. Stir in the sugar until fully combined.
Then add eggs, vanilla, and coffee. Mix well. After that, fold in flour just until incorporated. Finally, stir in 12 crushed Oreos.
Spread the batter evenly into your prepared pan. Spoon about ½ cup of the mint mixture over the top. Then lightly swirl it with a knife.
Swirl, Bake, and Cool
Bake for 23 to 25 minutes. The center should look set but still slightly fudgy.
After baking, let the brownies cool completely. This takes about 2 hours. Although it feels like a long wait, clean layers depend on full cooling.
Mix the Mint Frosting Layer
Once cooled, beat softened butter and powdered sugar until fluffy. Then add vanilla and a small splash of milk.
Next, blend in melted white chocolate and the remaining mint mixture. Adjust color if you want a brighter green.
Finish with Oreo Topping and Set Completely
Spread the mint frosting evenly over the cooled brownies. Then sprinkle 18 crushed Oreos on top. Gently press them into the surface.
Let the topping firm up before slicing. As a result, your Triple Layer Mint Brownies will have neat, defined layers.
Prep time takes about 30 minutes. Bake time runs about 25 minutes. Cooling time takes around 2 hours. In total, plan for about 3 hours. This recipe yields about 18 servings.

Expert Tips for the Best Triple Layer Mint Brownies
Balancing Mint Flavor
Mint extract packs power. Therefore, measure carefully. Start with ⅛ teaspoon and taste before adding more. Too much mint can overpower the chocolate quickly.
Achieving Clean Layers
Cool the brownies completely before frosting. Then chill the pan for easier slicing. Use a sharp knife and wipe it clean between cuts.
Also, let the brownies rest for about 24 hours before serving if possible. The flavor improves, and the texture becomes even richer.
Time Saving Shortcuts
If you feel short on time, use boxed brownie mix and store bought frosting. Then simply add the mint mixture and Oreo layers.
However, the homemade version gives deeper flavor. So choose based on your schedule.
Make Ahead and Storage Guide
Triple Layer Mint Brownies store beautifully. Keep them in an airtight container in the refrigerator for up to 10 days.
You can also freeze them for up to 6 months. Wrap slices tightly, then place in a freezer safe bag. Thaw overnight in the fridge before serving.
Because these brownies taste richer the next day, they work well for events. Make them ahead, chill them, and slice when ready.
Each serving contains approximately 705 calories, 126 grams carbohydrates, 4 grams protein, and 22 grams fat. It also includes about 13 grams saturated fat, 8 grams polyunsaturated fat, 71 milligrams cholesterol, 113 milligrams sodium, 1 gram fiber, and about 110 grams sugar.
Serving Suggestions and Flavor Notes
These Triple Layer Mint Brownies taste very rich, sweet, and fudgy. The mint chocolate flavor stands out boldly.
Serve them chilled for firmer layers. Or let them sit at room temperature for 20 minutes for softer texture. Meanwhile, a scoop of vanilla ice cream balances the sweetness nicely.
If you enjoy layered desserts, you might also like other fruity treats for contrast.
More Such Recipes
- Strawberry Crinkle Cookies Recipe
- Easy Cherry Pie Bars Recipe
- No Bake Lemon Meringue Pie Recipe
- Flaky Cherry Crumb Pie Recipe
- Mini Lemon Blueberry Cheesecakes Recipe
- Fluffy Strawberry Mousse Recipe
- Creamy White Chocolate Orange Mousse Recipe

Conclusion
Triple Layer Mint Brownies bring bold chocolate and cool mint together in three distinct layers. Although they look impressive, the steps stay simple and approachable. If you love rich, fudgy desserts with a refreshing twist, then this dessert belongs in your kitchen. Bake them once, and they will quickly become a repeat favorite.
you can follow more dessert inspiration on Pinterest and join our baking community on Facebook.
Print
Triple Layer Mint Brownies Amazing Fudgy Treat
- Total Time: 3 hours
- Yield: 18 servings 1x
- Diet: Vegetarian
Description
Triple Layer Mint Brownies feature a fudgy chocolate brownie base swirled with mint marshmallow, topped with creamy mint white chocolate frosting and crushed Cool Mint Oreos. Rich, sweet, and bold with refreshing mint flavor in every bite.
Ingredients
1 (7 oz) jar marshmallow fluff
⅛ teaspoon mint extract
Green food coloring, about 8 drops or as needed
4 oz baking chocolate
¾ cup unsalted butter
2 cups granulated sugar
3 eggs
1 teaspoon vanilla extract
2 tablespoons brewed coffee or espresso (optional)
1 cup all-purpose flour
12 Cool Mint Oreo cookies, roughly crushed (for batter)
½ cup butter or margarine, softened (for frosting)
3 to 4 cups powdered sugar
1 teaspoon vanilla extract (for frosting)
Small amount of milk as needed
¾ cup white chocolate chips, melted
18 Cool Mint Oreo cookies, roughly crushed (for topping)
Instructions
1. Preheat oven to 350°F and line a 9×13-inch pan with foil, then lightly grease it.
2. Stir together marshmallow fluff, mint extract, and green food coloring until evenly tinted; set aside.
3. Melt the baking chocolate and butter together until smooth. Mix in the sugar until fully combined.
4. Add eggs, vanilla, and coffee if using, stirring well. Gently mix in the flour just until incorporated, then fold in 12 crushed Oreos.
5. Spread the brownie batter evenly in the prepared pan. Spoon about ½ cup of the mint mixture over the batter and lightly swirl it through the top.
6. Bake for about 23 to 25 minutes, until the center is set but still fudgy. Allow brownies to cool completely.
7. Beat together softened butter, powdered sugar, vanilla, and a small splash of milk until smooth and fluffy.
8. Blend the melted white chocolate with the remaining mint mixture and prepared frosting; add more green coloring if desired.
9. Spread the green topping evenly over the cooled brownies and sprinkle with 18 crushed Oreos, gently pressing them into the surface.
10. Let the topping fully firm up before slicing and serving.
Notes
Use mint extract sparingly, as it is strong and can quickly overpower the flavor.
Boxed brownie mix and store-bought frosting can be used to simplify the recipe.
Allow the topping to completely set before cutting to keep layers clean and defined.
The brownies are very rich, sweet, and fudgy with a strong mint-chocolate flavor.
Flavor and texture improve after resting for about 24 hours before serving.
- Prep Time: 30 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 brownie
- Calories: 705
- Sugar: 110 g
- Sodium: 113 mg
- Fat: 22 g
- Saturated Fat: 13 g
- Unsaturated Fat: 8 g
- Trans Fat: 0 g
- Carbohydrates: 126 g
- Fiber: 1 g
- Protein: 4 g
- Cholesterol: 71 mg