Mint Chocolate Chip Brownies with Green Swirl Frosting
Mint chocolate chip brownies with green swirl frosting are a taste sensation that takes your classic brownie game to an entirely new level. Imagine biting into a rich, fudgy brownie infused with creamy mint flavor, complemented by a cool swirl of vibrant green frosting on top. This delightful treat captures the essence of mint chocolate while offering that signature brownie texture you love, creating the perfect balance of decadence and freshness all in one bite.
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I remember the first time I made these brownies; it was for a holiday gathering, and just one bite instantly turned me into a mint chocolate chip brownie fanatic. The reaction around the room was nothing short of magical. Friends and family couldn’t believe that such a simple recipe could transform into these gorgeous brownies. Not only are they easy to whip up, but they’re also perfect for any occasion, from birthday parties to cozy weekends. The combination of rich chocolate and minty freshness is sure to win over any crowd.
Why You’ll Love This Recipe
- Simple & Quick: This recipe comes together in just about an hour, making it a great choice for a last-minute dessert.
- Irresistible Flavor: The rich chocolate brownies paired with minty frosting create a delightful flavor that feels refreshing yet decadent.
- Eye-Catching Appeal: The fun green swirl frosting makes these brownies visually stunning—perfect for celebrations!
- Flexible Serving: Enjoy these brownies anytime, whether for dessert, as a snack, or even breakfast with your coffee. Who says you can’t have brownies for breakfast?
- Diet-Friendly Options: You can easily swap ingredients to make these brownies gluten-free or vegan based on your dietary needs!

Ingredients You’ll Need
- ½ cup unsalted butter: This adds richness and moisture to your brownies. For a dairy-free option, you can use coconut oil in place of butter.
- ¼ cup dark chocolate unsweetened cocoa powder: Accentuates the chocolate flavor. Look for high-quality cocoa powder for the best taste.
- ½ cup vegetable oil: This keeps the brownies moist. You can substitute with melted coconut oil for a tropical twist.
- 2 cups granulated sugar: Sweetness is key! For a twist, try using brown sugar for a caramel-like depth.
- 2 large eggs: They provide structure and richness. Use room-temperature eggs for better incorporation.
- ¼ cup buttermilk: This adds tenderness; substitute with plain yogurt or milk with a splash of vinegar if needed.
- 2 cups all-purpose flour: The base of your brownies. For a gluten-free option, use a 1:1 gluten-free flour blend.
- 1 teaspoon baking soda: This helps achieve the chewy texture. Be mindful of its freshness for the best rise.
- ½ teaspoon kosher salt: Balances out the sweetness. If using table salt, decrease the amount, as it’s more concentrated.
- 1 cup Andes crème de menthe baking chips: The star ingredient for that minty goodness. If you can’t find them, use chopped peppermint candies instead.
- ½ cup unsalted butter, softened (for frosting): This creates a smooth, spreadable frosting. Allow it to come to room temperature for easy mixing.
- ½ cup milk: Softens the frosting; you may adjust the amount for desired consistency.
- 4 cups powdered sugar: Creates sweet, fluffy frosting. Sift before measuring to avoid lumps.
- ½ teaspoon peppermint extract: Intensifies the mint flavor in the frosting. Make sure to use pure extract for the best taste.
- 1 drop green food coloring: Gives your frosting that festive minty look. A little goes a long way!
- ¾ cup mini semi-sweet chocolate chips: Adds a lovely chocolate burst in the frosting. You can swap these for dark chocolate chips if preferred.
How to Make Mint Chocolate Chip Brownies with Green Swirl Frosting
Preheat the Oven: Start off by preheating your oven to 400°F (200°C) and lining a 13″x9″ baking dish with parchment paper. This step ensures easy removal of your brownies once baked.
Combine Wet Ingredients: In a small saucepan over medium-high heat, combine ½ cup unsalted butter, ¼ cup dark chocolate unsweetened cocoa powder, and ½ cup vegetable oil. Stir frequently and bring the mixture to a gentle boil; then remove it from heat. This will give your brownies that rich chocolate taste.
Mix the Brownie Batter: In a large mixing bowl, combine 2 cups granulated sugar, 2 large eggs, and ¼ cup buttermilk. Gradually add in the chocolate mixture, being careful not to over-mix. Mix just until combined, then fold in 2 cups all-purpose flour, 1 teaspoon baking soda, ½ teaspoon kosher salt, and finally, the 1 cup of Andes crème de menthe baking chips.
Bake the Brownies: Pour the brownie batter into your prepared baking dish, smoothing it out evenly. Bake in your preheated oven for 20 minutes or until the edges are firm and the center begins to slightly puff. Once done, allow them to cool completely in the dish.
Prepare the Frosting: In a large mixing bowl, beat ½ cup softened unsalted butter for about 3 to 4 minutes until it’s light and fluffy. Then, add in ½ cup of milk, 4 cups of powdered sugar, ½ teaspoon peppermint extract, and a drop of green food coloring. Beat the mixture for an additional 3-5 minutes until you achieve a light, fluffy consistency. If needed, add more milk to reach your desired texture, then fold in ¾ cup mini semi-sweet chocolate chips.
Frost the Brownies: Spread the fluffy green frosting evenly over the cooled brownies. For an extra touch, you can create some swirls or patterns in the frosting for visual appeal.
Chill and Cut: Refrigerate the frosted brownies for at least 2 hours to allow the frosting to set. After chilling, cut them into squares and enjoy the deliciousness!

Storing & Reheating
Store the brownies in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate them, where they’ll stay fresh for about a week. You can even freeze these brownies for up to 3 months; just wrap them well to avoid freezer burn. When you’re ready to enjoy, simply thaw them in the fridge or on the counter. If you prefer a warm treat, pop them in the microwave for about 15-20 seconds, but be careful not to overheat; you want that heavenly fudginess intact!
Chef’s Helpful Tips
- Don’t over-mix your brownie batter after adding the flour; this can lead to a denser texture instead of the intended fudginess.
- Use room-temperature ingredients, especially the butter and eggs, for better incorporation and a smoother batter.
- If you want a more intense mint flavor, consider increasing the peppermint extract by an 1/8 teaspoon.
- Feel free to experiment with additional layers, like adding chopped nuts or marshmallows into the brownie mix before baking.
- Make the frosting a day ahead and store it in the fridge, then simply whip it again before spreading over the brownies.
These mint chocolate chip brownies with green swirl frosting are not only delicious but also versatile enough to suit any occasion. You’ll find them to be a crowd-pleaser that everyone will adore!
Recipe FAQs
Can I make these brownies ahead of time?
Absolutely! You can bake the brownies and store them in an airtight container for up to 3 days at room temperature. You can also freeze them for up to 3 months. Just make sure to wrap them well. When ready to serve, thaw overnight in the fridge if frozen.
Can I use fresh mint instead of extract?
While fresh mint has a wonderful flavor, it doesn’t provide the same intensity as peppermint extract in frosting or baked goods. If you want to incorporate fresh mint, try adding finely chopped mint leaves to the brownie batter. Consider boosting the frosting with peppermint extract for an extra mint flavor.
How do I know when the brownies are done baking?
Check your brownies after 20 minutes by inserting a toothpick in the center. They’re perfectly done when the toothpick comes out mostly clean with a few moist crumbs. If it comes out too wet, give them a couple more minutes in the oven. Remember, they will continue to cook slightly as they cool.
Can I make these brownies gluten-free?
Absolutely! Swap the all-purpose flour for a 1:1 gluten-free flour blend. This substitution works well without altering the texture or flavor too much, letting everyone enjoy these minty treats without worries.
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📖 Recipe Card

Mint Chocolate Chip Brownies with Green Swirl Frosting
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Total Time: 1 hour
- Yield: 24 servings 1x
- Category: Desserts & Appetizers
- Method: Baking
- Cuisine: American
Description
These Mint Chocolate Chip Brownies with Green Swirl Frosting are a mouthwatering dessert. Featuring rich chocolate flavor and refreshing mint, this easy-to-make treat is perfect for gatherings or a sweet snack at home.
Ingredients
- ½ cup unsalted butter
- ¼ cup dark chocolate unsweetened cocoa powder
- ½ cup vegetable oil
- 2 cups granulated sugar
- 2 large eggs
- ¼ cup buttermilk
- 2 cups all-purpose flour
- 1 teaspoon baking soda
- ½ teaspoon kosher salt
- 1 cup andes creme de menthe baking chips
- ½ cup unsalted butter softened
- ½ cup milk
- 4 cups powdered sugar
- ½ teaspoon peppermint extract
- 1 drop green food coloring
- ¾ cup mini semi-sweet chocolate chips
Instructions
- Preheat your oven to 400°F and line a 13×9 inch baking dish with parchment paper.
- In a small saucepan, combine the butter, cocoa powder, and oil over medium-high heat. Bring to a boil while whisking continuously, then remove from heat.
- In a large bowl, mix together the granulated sugar, eggs, and buttermilk. Slowly incorporate the butter mixture, being careful not to over mix.
- Add the flour, baking soda, and salt, stirring until just combined. Gently fold in the Andes mints.
- Pour the batter into the prepared baking dish and bake for 20 minutes. Allow cooling once baked.
- To prepare the frosting, beat the softened butter in a large bowl using an electric mixer for 3-4 minutes until pale.
- Mix in the milk, powdered sugar, peppermint extract, and green food coloring, beating until fluffy and light, adding more milk if necessary. Fold in mini chocolate chips.
- Spread the frosting over the cooled brownies and refrigerate for 2 hours to set before cutting.
Notes
Make sure not to over mix the batter for a fudgy texture.
Feel free to adjust the amount of peppermint extract based on your taste preference.
Refrigerating the brownies enhances the flavor and gives a better texture.
Nutrition
- Serving Size: 1 brownie
- Calories: 250
- Sugar: 25g
- Sodium: 150mg
- Fat: 12g
- Saturated Fat: 6g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 34g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 30mg
