Chocolate Mint Brownie Squares

Name: Chocolate Mint Brownie Squares
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 16 squares
Ingredients: 1 cup unsalted butter, melted; 2 cups granulated sugar; 4 large eggs; 1 teaspoon vanilla extract; 1 cup all-purpose flour; 1 cup unsweetened cocoa powder; 1/2 teaspoon salt; 1/2 cup unsalted butter, softened; 2 cups powdered sugar; 2 tablespoons milk; 1 teaspoon peppermint extract; Green food coloring (optional); 1 cup semi-sweet chocolate chips; 1/2 cup heavy cream

Highlighted under: Sweet Baking Favorites

I absolutely love whipping up these Chocolate Mint Brownie Squares when I want to treat myself or impress my friends. The combination of rich chocolate brownie with a refreshing mint layer creates a deliciously indulgent dessert. Each bite brings a perfect balance of flavors, and the texture is utterly satisfying. Plus, they are surprisingly easy to make, making them a go-to recipe for gatherings or simply for an afternoon pick-me-up. I guarantee your taste buds will thank you!

Created by

Lauren Mitchell

Last updated on 2026-01-13T05:05:36.390Z

When I first tried making these Chocolate Mint Brownie Squares, it was for a special dinner with friends. I experimented with several variations, but the classic brownie base with a light mint frosting was the clear winner. I love the way the mint complements the chocolate, creating a refreshing aftertaste that keeps everyone coming back for more.

One crucial detail I learned during my tests is to let the brownies cool completely before adding the mint layer. This prevents the frosting from melting and ensures that each square holds its beautiful shape. Trust me, it’s worth the wait!

        Why You'll Love This Recipe
        Decadent chocolate flavor with a refreshing mint twist
Rich, fudgy texture that's sure to satisfy your sweet tooth
Simple to make, perfect for parties and celebrations

      

The Importance of Quality Ingredients

The success of your Chocolate Mint Brownie Squares hinges on using high-quality ingredients, especially the chocolate. I recommend using semi-sweet chocolate chips with at least 60% cocoa content for the ganache. This will ensure a rich flavor and a glossy finish. If you prefer a different sweetness level, feel free to experiment with dark chocolate, but keep in mind the balance of sweetness in both the brownie and mint layers.

Another crucial ingredient is unsweetened cocoa powder in the brownie mix. Always choose a good-quality cocoa powder for a deep chocolate flavor. If you have Dutch-processed cocoa, it's an excellent option, as it provides a smoother taste; just remember it may alter the texture slightly. Avoid using low-quality substitutes, as they can result in a disappointing brownie that lacks depth.

Mint Frosting Tips and Variations

Getting the mint frosting just right involves both the flavor and the texture. I use powdered sugar instead of granulated sugar for a smoother consistency. Make sure to beat the butter until it's creamy before adding the sugar; this will help incorporate air, making the frosting light and fluffy. Don’t skimp on the peppermint extract—using a high-quality extract adds an authentic mint flavor that pairs beautifully with the chocolate.

If you're looking to switch things up, consider adding crushed peppermint candies into the frosting for texture and an extra minty kick. Alternatively, you can mix in a bit of cream cheese to the frosting for a tangy flavor contrast, which also enhances the creamy texture. Just remember that adding cream cheese will require refrigeration to keep the squares fresh.

Ingredients

For the Brownies

1 cup unsalted butter, melted
2 cups granulated sugar
4 large eggs
1 teaspoon vanilla extract
1 cup all-purpose flour
1 cup unsweetened cocoa powder
1/2 teaspoon salt

For the Mint Frosting

1/2 cup unsalted butter, softened
2 cups powdered sugar
2 tablespoons milk
1 teaspoon peppermint extract
Green food coloring (optional)

For the Ganache Topping

1 cup semi-sweet chocolate chips
1/2 cup heavy cream

Instructions

Prepare the Brownies

Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan. In a large bowl, combine the melted butter and sugar. Beat in the eggs one at a time, then stir in the vanilla. In another bowl, mix together flour, cocoa powder, and salt. Gradually add the dry ingredients to the wet ingredients until just combined. Pour the batter into the prepared pan and spread evenly.

Bake

Bake in the preheated oven for 30 minutes, or until a toothpick inserted into the center comes out mostly clean. Remove from the oven and let cool completely in the pan.

Make the Mint Frosting

In a medium bowl, cream the softened butter and gradually add in the powdered sugar. Pour in the milk and peppermint extract. Mix until smooth. Add green food coloring for a minty hue if desired. Once the brownies are cool, spread the frosting evenly over the top.

Prepare the Ganache

In a small saucepan, heat the heavy cream over medium heat until it begins to simmer. Remove from heat and add chocolate chips, stirring until smooth and shiny. Allow the ganache to cool slightly before pouring it over the mint frosting.

Cut and Serve

Let the ganache set for about 30 minutes at room temperature before cutting the brownies into squares. Enjoy your delicious Chocolate Mint Brownie Squares!

Pro Tips

Make sure to let the brownies cool completely before frosting to avoid melting. You can substitute fresh mint leaves for a more natural mint flavor, but make sure to blend them well for an even distribution.

Storage and Make-Ahead Options

To keep your Chocolate Mint Brownie Squares fresh, store them in an airtight container at room temperature for up to five days. If you need to keep them longer, consider refrigerating them, where they can last for up to a week. Just be sure to let them come to room temperature before serving, as the chocolate ganache can become firm in the fridge, affecting the texture.

These brownie squares also freeze well, so if you've made a big batch, cut them into squares and layer them in an airtight container with parchment paper in between each layer. They can last for up to three months in the freezer. When you're ready to indulge, simply thaw them in the refrigerator overnight or at room temperature for a few hours.

Troubleshooting Common Issues

If your brownies are coming out cakey rather than fudgy, it may be due to overmixing the batter. Be sure to mix until just combined after adding the dry ingredients; this will help retain the dense, fudgy texture. Additionally, keep an eye on your baking time—if you overbake the brownies, they can dry out, so check them early to achieve that perfect gooey center.

Another common issue can be the ganache not setting properly. Make sure the cream is hot when you add the chocolate chips, which helps in melting them effectively. If you find the ganache too runny, you can pop it in the refrigerator for a few minutes to thicken it up, but be cautious not to leave it too long, or it will be difficult to spread.

Questions About Recipes

→ Can I make these brownies ahead of time?

Yes, you can make the brownies a day in advance. Just keep them covered at room temperature.

→ How should I store leftovers?

Store any leftovers in an airtight container at room temperature for up to 3 days.

→ Can I substitute the peppermint extract?

Yes, you can use other extracts like vanilla or almond for a different flavor profile, but it will not retain the minty freshness.

→ Is there a vegan version of this recipe?

You can try substituting eggs with applesauce or flaxseed meal and use dairy-free butter and chocolate.