The Best Mint Chocolate Brownies: Fudgy, Refreshing & Irresistible

Mint chocolate brownies are the perfect balance of rich chocolate and refreshing mint.

Each bite is fudgy, smooth, and packed with flavor.

The contrast between the deep cocoa base, creamy mint frosting, and silky chocolate ganache makes them irresistible.

These brownies are a hit at any time of year but shine during the holidays.

Their cool, minty layer makes them a favorite for Christmas, St. Patrick’s Day, and winter gatherings.

Whether you’re baking for a party or just craving a chocolate-mint treat, this recipe delivers every time!

Why You’ll Love This Recipe

These mint chocolate brownies have everything you want in a dessert.

The brownie base is thick, fudgy, and packed with deep chocolate flavor.

Mixing cocoa powder and solid chocolate creates the perfect balance of chewiness and richness.

Brown sugar adds moisture, making every bite soft and decadent.

The mint frosting layer is smooth, creamy, and lightly sweet, flavored with pure peppermint extract for a refreshing contrast.

A thin layer of silky chocolate ganache on top ties everything together, melting in your mouth with every bite.

These brownies are made completely from scratch, using simple, high-quality ingredients.

No box mix needed—just real butter, chocolate, and sugar.

If you’re short on time, a brownie mix can work in a pinch, but the homemade version is unbeatable.

The layers stack neatly, creating a bakery-quality dessert that looks as good as it tastes.

Ingredients Needed

Each layer of these mint chocolate brownies is made with simple yet essential ingredients.

Every ingredient plays a key role in creating the perfect texture and flavor.

For the Brownie Layer

• 1 cup (16 Tbsp; 226g) unsalted butter – Adds richness and moisture for a fudgy texture.
• 8 ounces semi-sweet chocolate, coarsely chopped – Gives deep chocolate flavor and melts into the batter for extra chewiness.
• 1 ½ cups (300g) granulated sugar – Sweetens the brownies and helps create a crackly top.
• ½ cup (100g) packed light brown sugar – Adds moisture and a slight caramel-like depth to enhance the chocolate.
• 4 large eggs, at room temperature – Provide structure and keep the brownies dense and chewy.
• 2 teaspoons pure vanilla extract – Balances the chocolate with warm, aromatic flavor.
• ½ teaspoon salt – Enhances the sweetness and balances all the flavors.
• ½ cup + 3 Tablespoons (86g) all-purpose flour (spooned & leveled) – Just enough to hold the brownies together without making them cakey.
• ¼ cup (21g) natural unsweetened cocoa powder – Boosts the chocolate intensity and deepens the flavor.

For the Mint Frosting

• ½ cup (8 Tbsp; 113g) unsalted butter, softened to room temperature – The creamy base for a smooth, spreadable frosting.
• 2 cups (240g) confectioners’ sugar – Creates a light, fluffy texture with a touch of sweetness.
• 2 Tablespoons (30ml) milk – Helps thin the frosting to the right consistency.
• 1 ¼ teaspoons peppermint extract – Adds a refreshing minty flavor that pairs perfectly with the chocolate.
• 1 drop liquid or gel green food coloring (optional) – Gives the frosting a classic minty look.

For the Chocolate Ganache

• 1 heaping cup (about 200g) semi-sweet chocolate chips – Melt into a smooth, glossy topping with just the right sweetness.
• ½ cup (8 Tbsp; 113g) unsalted butter – Softens the ganache, making it rich but easy to slice through.

Step-by-Step Instructions

Step 1: Preparing the Brownie Base

1. Melt butter and chocolate: In a medium saucepan over medium heat, melt 1 cup (226g) unsalted butter and 8 ounces semi-sweet chocolate (coarsely chopped), stirring constantly for about 5 minutes. Alternatively, melt in a microwave-safe bowl in 20-second intervals, stirring after each, until smooth.
2. Mix in sugars: Remove from heat and let cool slightly for 10 minutes. Whisk in 1 ½ cups (300g) granulated sugar and ½ cup (100g) packed light brown sugar until fully combined.
3. Incorporate eggs and vanilla: Add 4 large eggs (one at a time), whisking well after each addition. Stir in 2 teaspoons pure vanilla extract until smooth.
4. Fold in dry ingredients: Gently fold in ½ teaspoon salt, ½ cup + 3 Tablespoons (86g) all-purpose flour, and ¼ cup (21g) natural unsweetened cocoa powder until just combined. Do not overmix.
5. Prepare the baking pan: Line a 9×13-inch baking pan with parchment paper, leaving overhang on all sides for easy removal. Lightly grease with butter or cooking spray.
6. Bake: Pour the batter into the prepared pan and smooth the top. Bake at 350°F (177°C) for 35-36 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs (not wet batter).
7. Cool completely: Allow the brownies to cool in the pan on a wire rack before adding the frosting.

Step 2: Preparing the Mint Frosting

1. Beat butter until smooth: In a medium mixing bowl, use a handheld or stand mixer to beat ½ cup (113g) unsalted butter (softened to room temperature) on medium speed for about 2 minutes until smooth and creamy.
2. Incorporate sugar and milk: Gradually add 2 cups (240g) confectioners’ sugar and 2 Tablespoons (30ml) milk, beating on low speed for 2 minutes, then increasing to high speed for 1 additional minute until fluffy.
3. Add peppermint flavor and color: Mix in 1 ¼ teaspoons peppermint extract and 1 drop of green food coloring (if using). Beat on high for 1 minute until fully incorporated.
4. Spread and set: Evenly spread the frosting over the completely cooled brownie layer using an offset spatula. Refrigerate for at least 1 hour (or up to 4 hours) to allow the frosting to firm up.

Step 3: Preparing the Chocolate Ganache

1. Melt chocolate and butter: In a small saucepan over medium heat, melt 1 heaping cup (200g) semi-sweet chocolate chips and ½ cup (113g) unsalted butter, stirring constantly until smooth. Alternatively, microwave in 20-second intervals, stirring after each, until fully melted.
2. Cool slightly: Let the chocolate mixture cool for 5 minutes to prevent melting the frosting when poured.
3. Spread over frosting: Evenly pour and spread the chocolate ganache over the set mint frosting layer using a spatula.
4. Chill to set: Refrigerate for at least 1 hour (or overnight) until the ganache is fully set.

Once the chocolate layer is firm, remove the brownies from the pan using the parchment paper overhang.

Slice into squares with a sharp knife, wiping the blade between cuts for clean edges.

Serve chilled or let them sit at room temperature for a few minutes for a softer texture.

Tips for Success

Getting the perfect mint chocolate brownies requires a few simple techniques.

Follow these tips to ensure clean layers, a smooth batter, and a flawless finish.

Cool the Brownies Completely Before Frosting

Patience is key when layering these brownies.

If the brownie base is still warm, the mint frosting will melt and become runny.

This can cause the layers to blend instead of staying distinct.

Let the brownies cool completely in the pan before spreading the frosting.

For best results, place them on a wire rack to speed up the cooling process.

If needed, refrigerate the brownies for 30 minutes before frosting to make sure they’re firm.

Use Room Temperature Ingredients for a Smoother Batter

Cold ingredients don’t mix well and can lead to a lumpy batter.

To achieve a smooth, evenly combined mixture, bring your eggs and butter to room temperature before starting.

This allows the butter to blend with the sugar properly, creating a fudgier texture.

Room temperature eggs also help the batter hold more air, making the brownies less dense.

If you forget to take the eggs out ahead of time, place them in a bowl of warm water for 5–10 minutes to speed up the process.

Wipe the Knife Between Slices for Clean Cuts

For neatly cut brownies, use a sharp knife and wipe it clean between each slice.

Chocolate ganache can stick to the blade, creating uneven edges.

Running the knife under warm water and drying it off before each cut helps create smooth, bakery-style squares.

If the brownies have been in the fridge, let them sit at room temperature for about 10 minutes before slicing.

This prevents the chocolate layer from cracking and makes cutting easier.

Variations and Substitutions

Alternative Flavors

Peppermint extract gives these brownies a bold, refreshing taste, but it’s not the only option.

For a smoother, slightly sweeter mint flavor, substitute peppermint extract with crème de menthe.

This liqueur has a milder, more balanced mint taste and can enhance the chocolate richness.

If using crème de menthe, reduce the amount slightly since it contains alcohol, which can thin the frosting.

Start with 1 teaspoon, taste, and add more as needed.

Dietary Adjustments

Gluten-Free Option

To make these brownies gluten-free, swap the all-purpose flour with a 1:1 gluten-free flour blend.

Look for a blend that contains xanthan gum, which helps mimic the structure of regular flour.

Avoid almond or coconut flour as a direct substitute since they absorb moisture differently and will change the texture.

The rest of the ingredients remain the same, so you’ll still get rich, fudgy brownies with the perfect balance of mint and chocolate.

Dairy-Free Option

For a dairy-free version, replace the butter in all three layers with a plant-based alternative.

Use a dairy-free margarine or vegan butter that has a similar fat content to regular butter.

For the chocolate layers, check that your chocolate chips are dairy-free—many brands offer vegan-friendly options.

Instead of milk in the frosting, use unsweetened almond, oat, or coconut milk.

Stick with neutral-flavored dairy-free milk to avoid altering the taste.

Serving Suggestions

Mint chocolate brownies can be enjoyed in different ways depending on the texture and experience you prefer.

For a truly indulgent dessert, pair them with a scoop of vanilla ice cream.

The creamy, mild sweetness of the ice cream balances the rich chocolate and refreshing mint, creating a perfect contrast in both flavor and temperature.

If you prefer a firmer texture, serve the brownies chilled straight from the fridge.

This keeps the layers intact and makes each bite dense, fudgy, and slightly chewy.

If you like a softer bite, let the brownies sit at room temperature for about 10–15 minutes before serving.

This allows the chocolate ganache to soften slightly, making the layers blend together for a smoother, melt-in-your-mouth experience.

Storage and Freezing Instructions

To keep mint chocolate brownies fresh, store them in an airtight container in the refrigerator for up to 5 days.

Chilling helps maintain the distinct layers and prevents the frosting from becoming too soft.

If stacking the brownies, place a piece of parchment paper between the layers to prevent sticking.

For longer storage, wrap individual brownies tightly in plastic wrap to lock in moisture, then place them in a freezer-safe bag or container.

They will stay fresh in the freezer for up to 3 months.

When ready to eat, thaw brownies in the refrigerator overnight or at room temperature for about 30 minutes.

Conclusion

These mint chocolate brownies are rich, fudgy, and packed with refreshing mint flavor. They’re easy to make and perfect for any occasion.

Whether you serve them chilled or at room temperature, they always deliver a satisfying bite.

Give this recipe a try and see for yourself.

Let us know how they turned out by leaving a comment below.

Have a question? Ask away—We’re happy to help!

FAQ’s

Can I use a boxed brownie mix as a base?

Yes, you can use a boxed brownie mix if you’re short on time.

Follow the package instructions, but bake the brownies in a 9×13-inch pan to match this recipe’s proportions.

Once baked, let them cool completely before adding the mint frosting and ganache.

While homemade brownies offer a richer, fudgier texture, a boxed mix still works well with the layers.

What’s the difference between peppermint and mint extract?

Peppermint extract has a bold, cooling flavor commonly used in desserts.

Mint extract is a blend of peppermint and spearmint, giving it a milder, slightly herbal taste.

For this recipe, peppermint extract is best because it enhances the chocolate without tasting overly sweet or artificial.

How can I prevent the chocolate ganache from cracking when cutting?

For clean, smooth slices, let the brownies sit at room temperature for 10–15 minutes before cutting.

This softens the ganache slightly, preventing cracks.

Use a sharp knife, and wipe it clean between cuts for neat edges. If the ganache is too firm, run the knife under warm water, dry it off, and then slice.

This helps the blade glide through smoothly without breaking the top layer.