Mint Chocolate Brownie Squares Recipe

ByLucy
Jump to Recipe· 4.8 from 24 reviews

If you’ve ever dreamed of biting into the perfect dessert that balances rich chocolate with refreshing mint, then I have a treat for you. This Mint Chocolate Brownie Squares Recipe is exactly what you need to try next – fudgy brownies layered with silky mint frosting and a luscious chocolate topping. Trust me, once you make these, they’ll be your new go-to for celebrations, dinner parties, or a cozy night in with a cup of tea. Let’s dive in so you can get these beauties baking in your kitchen!

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Why This Recipe Works

  • Layered Flavors: The combination of rich chocolate brownie, minty frosting, and chocolate ganache layer creates a dessert that’s decadent yet refreshing.
  • Perfect Texture: Fudgy brownies underneath a creamy, smooth frosting and a crisp chocolate topping strike the ideal contrast in each bite.
  • Easy to Customize: You can tweak the mint intensity, chocolate type, or even pan size without losing that signature flavor.
  • Reliable Results: This recipe has been tested multiple times and works beautifully in home kitchens of all skill levels.
Mint Chocolate Brownie Squares, Mint Chocolate Dessert, Fudgy Mint Brownies, Chocolate Mint Treats, Easy Mint Brownie Recipe - The image shows square dessert bars with three clear layers. The bottom layer is thick and dark brown, crumbly with a rough texture. The middle layer is a thick, creamy mint green that looks soft and smooth. The top layer is a shiny, smooth dark chocolate coating that is evenly spread. The bars are placed on white parchment paper on a dark wooden surface with a white marbled texture background. Photo taken with an iphone --ar 2:3 --v 7 this …

Ingredients & Why They Work

This Mint Chocolate Brownie Squares Recipe calls for classic baking ingredients that blend beautifully, plus a few tricks to keep the mint flavor fresh and vibrant. Using both granulated and brown sugar gives the brownies a great chewy texture, while peppermint extract adds that crisp minty kick without overpowering the chocolate.

Mint Chocolate Brownie Squares, Mint Chocolate Dessert, Fudgy Mint Brownies, Chocolate Mint Treats, Easy Mint Brownie Recipe - Flat lay of a small pile of coarsely chopped semi-sweet chocolate chunks, a few large whole brown eggs with clean shells, a small mound of light and dark brown granulated sugar side by side, a small white ceramic bowl filled with softened unsalted butter, a small white ceramic bowl with natural unsweetened cocoa powder, a small white ceramic bowl of fine all-purpose flour, a small white ceramic bowl containing fine confectioners’ sugar, a small white ceramic bowl with milk, a couple of fresh green mint sprigs, and a small white ceramic bowl with glossy semi-sweet chocolate chips, all arranged with perfect symmetry and balanced proportions, placed on a clean white marble surface, soft natural light, photo taken with an iPhone, professional food photography style, fresh ingredients, white ceramic bowls, no bottles, no duplicates, no utensils, no packaging --ar 2:3 --v 7 --p m7354615311229779997
  • Unsalted butter: Using unsalted allows you to control the salt content precisely.
  • Semi-sweet chocolate: This gives a balanced sweetness and rich cocoa depth.
  • Granulated sugar & light brown sugar: The mix creates moist, chewy brownies with a subtle caramel note.
  • Eggs: They provide structure and richness; room temperature eggs help blend smoothly.
  • Vanilla extract: Enhances the overall flavor profile with warmth.
  • Salt: Balances sweetness and amplifies the chocolate taste.
  • All-purpose flour & cocoa powder: The right ratio creates fudgy brownies instead of cakey.
  • Confectioners’ sugar: Provides that silky, sweet frosting texture.
  • Milk: Adds moisture for a spreadable mint frosting.
  • Peppermint extract: Opt for peppermint over mint extract for a clean, true mint flavor without artificial taste.
  • Semi-sweet chocolate chips: Melted for the glossy, rich chocolate topping.
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Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Make It Your Way

I love personalizing this Mint Chocolate Brownie Squares Recipe to shake things up a bit. It’s so simple to switch out ingredients or tweak the layers to suit your mood or occasion. Don’t be shy about trying your favorites—it’s all about making it your own delicious masterpiece.

  • Variation: I once swapped the semi-sweet chocolate for a dark chocolate with 70% cocoa – it gave the brownies a beautifully intense flavor that paired really well with the mint frosting.
  • Dietary: Try using dairy-free butter substitutes and vegan chocolate chips to make this recipe vegan-friendly.
  • Seasonal twist: Around the holidays, I like to add crushed candy canes on top of the chocolate layer for an extra festive crunch.

Step-by-Step: How I Make Mint Chocolate Brownie Squares Recipe

Step 1: Melting your chocolate and butter to start

First things first: gently melt the butter and chopped semi-sweet chocolate together. I usually do this on the stovetop over medium heat, stirring often so it doesn’t scorch, but if you’re short on time, the microwave works great too—just heat in 20-second bursts, stirring in between. Be patient, and once melted, let it cool for about 10 minutes; this step ensures the eggs won’t scramble when you add them later.

Step 2: Mixing sugars, eggs, and dry ingredients

Next, whisk in both granulated and brown sugars into your chocolate mixture until everything’s smooth and glossy. Then, add the eggs one at a time—this helps the batter stay silky and not curdle. Stir in vanilla extract and then carefully fold in the salt, flour, and cocoa powder. The fold technique keeps the batter tender and fudgy—try not to overmix!

Step 3: Baking the brownies to fudgy perfection

Pour your batter into a parchment-lined 9×13-inch pan and bake at 350°F (177°C) for about 35-36 minutes. I always recommend checking around 30 minutes with a toothpick; you want it to come out with a few moist crumbs attached, not wet batter. It’s the key to that perfect fudgy bite. Then, let them cool completely—that’s crucial for the next layers to work well.

Step 4: Whipping up the cool mint frosting

Using softened butter, confectioners’ sugar, and a bit of milk, whip your frosting until smooth and creamy. Add peppermint extract gradually—start with 1¼ teaspoons and taste, as it can be pretty potent. If you’re feeling festive, a drop of green food coloring makes the frosting pop visually. Spread this evenly over the cooled brownies, then chill them in the fridge for at least an hour. This step is a game-changer—it firms up the frosting so the chocolate topping spreads without smushing through.

Step 5: The final glossy chocolate layer

Last but definitely not least, melt butter and chocolate chips the same way you did for the brownie base. Pour this luscious chocolate over the chilled mint frosting and gently smooth it out with an offset spatula. Pop the brownies back into the fridge for another hour (or longer if you have time). Once set, you’re ready to cut these mint chocolate brownie squares out. Pro tip: use a sharp knife and wipe it between cuts for clean edges!

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Tips from My Kitchen

  • Cooling is Key: Don’t try to frost warm brownies—waiting until they’re fully cool prevents melting and helps layers stay neat.
  • Peppermint Adjustments: Taste the frosting before spreading; peppermint extract can be strong—add more gradually if you like it mintier.
  • Parchment Paper Magic: Lining your pan with parchment and leaving an overhang makes lifting the whole slab out a breeze.
  • Cut Clean Squares: Use a sharp, large knife and wipe between cuts to keep edges nice and tidy—especially important for serving!

How to Serve Mint Chocolate Brownie Squares Recipe

Mint Chocolate Brownie Squares, Mint Chocolate Dessert, Fudgy Mint Brownies, Chocolate Mint Treats, Easy Mint Brownie Recipe - The image shows a close-up of stacked chocolate mint bars with three clear layers. The bottom layer is a thick, dark brown, dense chocolate base with a slightly rough texture. The middle layer is a mint-green creamy filling, smooth but fluffy-looking with tiny air bubbles. The top layer is a glossy, dark chocolate sheet, smooth and shiny with a very clean finish. The bars are cut into square shapes resting on white parchment paper on a white marbled surface. Photo taken with an iphone --ar 2:3 --v 7

Garnishes

When I serve these brownies, I keep the garnishes simple but elegant. A light dusting of cocoa powder or crushed peppermint candies sprinkled on top of the chocolate layer adds a festive look and extra crunch. Sometimes, I add a small fresh mint leaf on each square for a pop of color and aroma that gets compliments every time.

Side Dishes

I love pairing these mint chocolate brownie squares with a scoop of vanilla bean ice cream or a drizzle of homemade raspberry sauce. The tartness of the berries balances the richness, and the cool ice cream complements the mint frosting perfectly.

Creative Ways to Present

For special occasions, I sometimes layer several squares in a glass trifle dish with whipped cream and fresh raspberries for a stunning and decadent dessert centerpiece. Alternatively, stacking a few brownies on a pretty plate, dusted with edible gold leaf or shimmering sugar, makes them feel extra celebratory and Instagram-worthy.

Make Ahead and Storage

Storing Leftovers

Leftover Mint Chocolate Brownie Squares keep really well in an airtight container in the fridge for up to five days. I’ve found that chilling them also helps the flavors meld together beautifully, making them even tastier the next day.

Freezing

Freezing is a great option if you want to prep ahead. What’s worked best for me is freezing the baked brownies plain (without frosting or chocolate topping), thawing overnight in the fridge or at room temperature, and then adding the mint frosting and chocolate topping fresh. You can also freeze fully assembled brownies, but I recommend thawing slowly in the fridge to keep the layers intact.

Reheating

I typically enjoy these brownies chilled or at room temperature, but if you want them a bit warm, a few seconds in the microwave (about 10-15 seconds) works wonders. Just be cautious not to warm them too much or the frosting and chocolate layers may melt.

FAQs

  1. Can I use mint extract instead of peppermint extract?

    While you can use mint extract, I firmly recommend peppermint extract for this recipe. Peppermint provides a cleaner, more authentic mint flavor, whereas mint extract can sometimes taste artificial or like spearmint toothpaste, which might overpower the chocolate layers.

  2. How do I ensure fudgy brownies and not cakey?

    The key is to measure your flour carefully—spoon and level rather than scooping directly from the bag—and bake just until the brownies pull away from the edges and a toothpick comes out with moist crumbs. Overbaking dries them out and leads to cakier brownies.

  3. Can I make these brownies in a smaller pan?

    Absolutely! If you want to bake in a 9-inch square pan instead of 9×13, just halve the frosting and chocolate topping quantities. Be sure to check baking times closely, as the smaller pan may bake faster.

  4. What’s the best way to cut these layered brownies?

    Use a large, very sharp knife and make quick, confident cuts. Wipe the blade clean between each cut to keep edges neat and avoid dragging frosting or chocolate.

Final Thoughts

This Mint Chocolate Brownie Squares Recipe is close to my heart because it brings together two of my all-time favorite flavors in such a beautifully layered way. I love how each bite offers creamy mint, rich chocolate, and fudgy brownie goodness all at once—and I bet you will too. Give it a try soon, and be ready for a flood of compliments and requests for seconds. Honestly, once you make these, they might just become your dessert staple!

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Mint Chocolate Brownie Squares Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.8 from 24 reviews
  • Author: Lucy
  • Prep Time: 1 hour
  • Cook Time: 36 minutes
  • Total Time: 6 hours
  • Yield: 24 brownies
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
Print Recipe

Description

Classic Mint Chocolate Brownies combine rich, fudgy chocolate brownies with a refreshing mint frosting and a smooth chocolate layer on top. These decadent treats are perfect for chocolate and mint lovers, featuring a moist brownie base, creamy mint icing, and a glossy chocolate finish. Ideal for parties, holidays, or whenever a sweet indulgence is needed.

Ingredients

Units Scale

Brownies

  • 1 cup (16 Tbsp; 226g) unsalted butter
  • 8 ounces semi-sweet chocolate, coarsely chopped
  • 1 and 1/2 cups (300g) granulated sugar
  • 1/2 cup (100g) packed light brown sugar
  • 4 large eggs, at room temperature
  • 2 teaspoons pure vanilla extract
  • 1/2 teaspoon salt
  • 1/2 cup + 3 tablespoons (86g) all-purpose flour (spooned & leveled)
  • 1/4 cup (21g) natural unsweetened cocoa powder

Mint Frosting Layer

  • 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature
  • 2 cups (240g) confectioners’ sugar
  • 2 Tablespoons (30ml) milk
  • 1 and 1/4 teaspoons peppermint extract
  • 1 drop liquid or gel green food coloring (optional)

Chocolate Layer

  • 1/2 cup (8 Tbsp; 113g) unsalted butter
  • 1 heaping cup (around 200g) semi-sweet chocolate chips

Instructions

  1. Prepare Brownie Batter: Melt the butter and chopped semi-sweet chocolate together in a medium saucepan over medium heat, stirring constantly for about 5 minutes until smooth. Alternatively, melt in a microwave-safe bowl in 20-second increments, stirring after each. Remove from heat and transfer to a large mixing bowl. Let cool slightly for 10 minutes.
  2. Preheat Oven and Prep Pan: Adjust oven rack to the lower third position and preheat the oven to 350°F (177°C). Line a 9×13-inch baking pan with parchment paper on the bottom and sides, leaving overhang for easy removal. Set aside.
  3. Mix Wet and Dry Ingredients: Whisk granulated and brown sugars into the cooled chocolate mixture until combined. Add eggs one at a time, whisking well after each addition to create a smooth batter. Whisk in vanilla extract. Gently fold in salt, flour, and cocoa powder until fully incorporated without overmixing.
  4. Bake Brownies: Pour batter evenly into the prepared pan and smooth the top. Bake for 36 minutes or until the edges begin to pull away from the sides and a toothpick inserted in the center comes out with a few moist crumbs. Cool brownies completely on a wire rack in the pan. Once cooled, lift brownies out using parchment paper overhang and place on a baking sheet for frosting.
  5. Make Mint Frosting: Using a handheld or stand mixer with paddle attachment, beat softened butter on medium speed for 2 minutes until creamy. Add confectioners’ sugar and milk, beating on low for 2 minutes then high for 1 minute. Mix in peppermint extract and green food coloring if using, beating on high for 1 minute until fluffy. Taste and adjust peppermint flavor if desired.
  6. Frost Brownies and Chill: Spread mint frosting evenly over cooled brownies on the baking sheet. Refrigerate for at least 1 hour and up to 4 hours to allow frosting to set, which helps with applying the topping.
  7. Prepare Chocolate Topping: Melt butter and semi-sweet chocolate chips together in a medium saucepan over medium heat, stirring constantly for about 5 minutes until smooth. Alternatively, use the microwave in 20-second intervals, stirring thoroughly between each.
  8. Finish Brownies: Pour melted chocolate topping evenly over the chilled mint frosting layer. Smooth gently with a knife or offset spatula. Return brownies to the refrigerator on the baking sheet and chill for 1 hour to set the chocolate layer fully, or up to 4 hours or overnight for best results.
  9. Cut and Serve: Remove chilled brownies from refrigerator. Using a very sharp large knife, make quick, clean cuts into squares, wiping the blade with a paper towel between each cut for neat edges. Serve at room temperature or chilled.
  10. Storage: Keep any leftovers tightly covered and refrigerated for up to 5 days.

Notes

  • Make Ahead & Freezing: Freeze baked brownies before frosting, then thaw overnight in the refrigerator before adding mint frosting and chocolate topping for freshest results. Alternatively, freeze the fully finished brownies and thaw overnight in the fridge before slicing.
  • Special Tools Recommended: Saucepan, 9×13-inch baking pan (glass or metal), mixing bowls, whisk, silicone spatula, cooling rack, electric mixer, offset spatula.
  • Peppermint Extract Tip: Use peppermint extract for authentic mint flavor; avoid mint extract which can taste like spearmint toothpaste.
  • Pan Size Adjustment: To use a 9-inch square pan, halve the frosting and chocolate topping quantities.
  • Baking Note: Oven temperatures vary, so use toothpick test after 30 minutes to avoid overbaking.

Nutrition

  • Serving Size: 1 brownie
  • Calories: 320 kcal
  • Sugar: 28 g
  • Sodium: 110 mg
  • Fat: 20 g
  • Saturated Fat: 12 g
  • Unsaturated Fat: 7 g
  • Trans Fat: 0 g
  • Carbohydrates: 34 g
  • Fiber: 2 g
  • Protein: 3 g
  • Cholesterol: 65 mg

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