Mint Chocolate Brownies | Easy St Patrick’s Day Fudgy Brownies
There’s something truly special about the combination of mint and chocolate, especially when it comes to brownies. These Mint Chocolate Brownies are simply divine, offering a fudgy texture that’s both rich and velvety. Topped with a delightful mint frosting and a shiny chocolate ganache, they are perfect for St. Patrick’s Day, or any day you crave something sweet and refreshing. Each bite melts in your mouth, revealing layers of flavor that are delightfully balanced — not too minty, yet just enough to wake up your taste buds.
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I first discovered this beauty of a dessert while searching for the perfect St. Patrick’s Day treat to make for my friends. With its festive green hue and mouthwatering taste, it quickly became a go-to recipe. Packed with flavor and easy to make, these brownies are guaranteed to impress. They’re more than just a dessert; they’re a crowd-pleaser that will have everyone asking for seconds. I can’t wait for you to try these!
Why You’ll Love This Recipe
- Simple & Quick: Prep in just 15 minutes, then let the oven do the work for 40 minutes.
- Irresistible Flavor: Rich chocolate and refreshing mint create a mouthwatering combination.
- Eye-Catching Appeal: Perfectly layered, these brownies are as beautiful as they are delicious.
- Flexible Serving: Great for parties, get-togethers, or an indulgent snack at home.
- Diet-Friendly Options: Adaptable for various dietary needs with some modifications.

Ingredients You’ll Need
- ½ cup (113g) unsalted butter: This keeps the brownies moist and fudgy; make sure to cut it into slices for easy melting.
- 8 ounces (227g) semi-sweet chocolate: Coarsely chopped for a smooth batter and rich flavor; use good quality chocolate for the best taste.
- ¾ cup (150g) firmly packed brown sugar: Adds moisture and a deep caramel flavor; do not substitute with granulated sugar alone.
- ¼ cup (50g) granulated sugar: Balances the sweetness; using a combo yields the best texture.
- 3 large eggs: Preferably at room temperature to ensure they incorporate smoothly into the batter.
- 1 teaspoon vanilla extract: Enhances the overall flavor with a warm aroma.
- ¾ cup (90g) all-purpose flour: Essential for structure; be sure to fluff before measuring to avoid excess.
- ¼ teaspoon salt: Balances flavors, enhancing sweetness.
- ½ cup (113g) unsalted butter (softened): Used for the mint frosting; ensure it’s at room temperature for easy mixing.
- 2 cups (240g) powdered sugar: Sweetens your frosting without grittiness; sift it first for a smoother texture.
- ¼ cup (60ml) milk or cream: Used to achieve a creamy consistency in the frosting; adjust based on desired thickness.
- ½ to ¾ teaspoon peppermint extract: The star of the show for that fresh minty flavor; adjust to your preference.
- 2 drops green liquid or gel food coloring: Just a hint for that festive look; optional but fun for presentation!
- 1 cup (175g) semi-sweet chocolate chips: Folded into the brownie batter for bursts of chocolate.
- ⅔ cup (160ml) heavy cream: Used for the chocolate ganache, creating a rich, silky texture.
How to Make Mint Chocolate Brownies | Easy St Patrick’s Day Fudgy Brownies
Preheat the oven: Set your oven to 350ºF (177ºC) and line an 8″ or 9″ square baking pan with foil, then spray it with nonstick cooking spray. This makes it super easy to lift the brownies out later.
Melt the chocolate and butter: In a medium saucepan over medium heat, combine the sliced butter and chopped semi-sweet chocolate. Stir frequently until the mixture is completely smooth and glossy, then let it cool for about 15 minutes. This cooling step is important; it prevents the eggs from cooking when added.
Whisk in the sugars: Once the chocolate mixture is cool, whisk in ¾ cup brown sugar and ¼ cup granulated sugar until well combined. The sugars will help create a tender brownie texture.
Add the eggs and vanilla: Beat in 3 large eggs, one at a time, whisking thoroughly after each addition to ensure a smooth mixture. Follow this with 1 teaspoon of vanilla extract for a hint of comforting warmth.
Incorporate the dry ingredients: Gently fold in ¾ cup all-purpose flour and ¼ teaspoon salt. Be careful not to overmix; you want just enough to combine the flour without toughening the brownies.
Bake the brownies: Pour the thick, glossy batter into your prepared baking pan. Bake for 25-30 minutes or until a toothpick inserted comes out mostly clean with a few moist crumbs—this means fudgy perfection! Cool completely before proceeding.
Make the mint frosting: In a large bowl with a handheld mixer, beat ½ cup softened unsalted butter on medium speed until creamy, about 2 minutes. Gradually add 2 cups powdered sugar, ½ to ¾ teaspoon peppermint extract, and ¼ cup milk or cream. Incorporate everything at low speed, then increase to medium and mix until smooth. If it’s too stiff, add a dash more milk; if too runny, add more powdered sugar.
Prepare the chocolate ganache: Place 1 cup semi-sweet chocolate chips in a small bowl. In a small saucepan over medium heat, warm ⅔ cup heavy cream until steaming. Pour it over the chocolate chips and whisk until the mixture is completely smooth. Allow it to cool for at least 20 minutes.
Frost the brownies: Once the brownie base is cool, spread the mint frosting evenly over the brownies with a spatula. The fresh green color will make it look inviting!
Top with ganache: Pour the cooled chocolate ganache over the mint frosting layer quickly. It should spread easily, but you can help it along with a spatula, ensuring it reaches the edges.
Set the brownies: Place the entire pan in the refrigerator for at least 2 hours, allowing the ganache to fully set. This step is key for clean cuts later.
Slice and serve: Once the brownies are cool, lift them out using the foil overhang, peel off the foil, and transfer the block to a cutting board. Use a sharp knife to slice it into 16 squares, cleaning the knife between cuts for neat edges.

Storing & Reheating
Store your Mint Chocolate Brownies at room temperature in an airtight container for up to 3 days. For longer freshness, refrigerate them where they can last for a week. These brownies also freeze beautifully for up to 3 months. When ready to enjoy, let them thaw in the refrigerator overnight. Note that texture may slightly change after freezing, but you can revive their flavor by warming a piece in the microwave for seconds.
Chef’s Helpful Tips
- Make sure to check the temperature of your butter before using it; cold butter won’t cream well and can lead to dense frosting.
- If you’re using room-temperature eggs, they mix better into the batter, ensuring an even, fluffy blend.
- Remember not to overmix after adding flour; this will keep your brownies soft and tender instead of tough.
- If your brownies seem too gooey, check that they have baked long enough. Let them cool completely to firm up.
- For an extra indulgent treat, consider adding crushed peppermint candies or sprinkles on top of the ganache before it sets.
These Mint Chocolate Brownies are a perfect way to celebrate life’s sweet moments, whether it’s St. Patrick’s Day or just because! Each layer complements the next, providing a satisfying crunch contrasted with rich, smooth layers underneath. Feel free to experiment with flavors, maybe try adding a hint of espresso for a mocha twist or some roasted nuts for added texture. Whatever path you choose, enjoy every delicious bite!
Recipe FAQs
Can I use dark chocolate instead of semi-sweet?
Absolutely! Dark chocolate will give your brownies a slightly richer flavor, so choose a high-quality dark chocolate for the best results.
Can I make this recipe gluten-free?
Yes, you can substitute the all-purpose flour with a 1:1 gluten-free flour blend. Make sure it contains xanthan gum, or you can add some to help with texture.
How can I adjust the mint flavor?
The amount of peppermint extract can be adjusted to your taste. Start with ½ teaspoon and taste the frosting before adding more if you prefer a stronger mint flavor.
How do I prevent brownies from sticking to the pan?
Using foil to line the pan and spraying it with nonstick spray helps to release the brownies easily. Make sure to let them cool completely before lifting them out for the cleanest cuts.
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📖 Recipe Card

Mint Chocolate Brownies | Easy St Patrick’s Day Fudgy Brownies
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: 16 servings 1x
- Category: Desserts
- Method: Baking
- Cuisine: American
Description
These Mint Chocolate Brownies combine rich chocolate and refreshing mint, creating a delicious treat that’s perfect for any occasion. This easy recipe features simple ingredients and a straightforward baking method, making these brownies a delightful addition to your dessert table. Don’t miss out on this chocolatey, minty delight!
Ingredients
- ½ cup (113g) unsalted butter cut into 6-8 slices
- 8 ounces (227g) semi-sweet chocolate coarsely chopped
- ¾ cup (150g) firmly packed brown sugar
- ¼ cup (50g) granulated sugar
- 3 large eggs room temperature preferred
- 1 teaspoon vanilla extract
- ¾ cup (90g) all-purpose flour be sure to measure properly
- ¼ teaspoon salt
- ½ cup (113g) unsalted butter softened to room temperature
- 2 cups (240g) powdered sugar
- ¼ cup (60ml) milk or cream
- ½ to ¾ teaspoon peppermint extract
- 2 drops green liquid or gel food coloring
- 1 cup (175g) semi-sweet chocolate chips
- ⅔ cup (160ml) heavy cream
Instructions
- Preheat the oven to 350ºF (177ºC). Line an 8" or 9" square baking pan with foil and spray it with nonstick spray. Set aside.
- Melt the butter and chopped chocolate in a medium saucepan over medium heat, stirring frequently until smooth. Allow it to cool for about 15 minutes.
- Whisk the sugars into the cooled chocolate mixture until well combined. Add the eggs one at a time, whisking well after each addition. Stir in the vanilla extract.
- Gently mix in the flour and salt until fully incorporated.
- Pour the batter into the prepared pan. Bake for 25-30 minutes until a toothpick inserted in the center comes out mostly clean. Let them cool completely before preparing the next layers.
Notes
Make sure to measure the flour accurately for the best texture.
These brownies can be stored in an airtight container for up to a week.
For a richer flavor, use high-quality chocolate.
Nutrition
- Serving Size: 1 brownie
- Calories: 210
- Sugar: 18g
- Sodium: 120mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 29g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 40mg
