Ingredients

1 box brownie mix (follow package instructions)

Eggs as directed on the brownie box

Oil as directed on the brownie box

Water as directed on the brownie box

3/4 cup salted butter (softened)

2 cups powdered sugar

1 teaspoon mint extract

1-2 drops green food coloring

1-2 tablespoons heavy whipping cream

2 cups semi-sweet chocolate chips

1 cup heavy whipping cream

Instructions

Step 1: Preheat your oven according to the brownie box instructions. Line an 8×8 inch baking pan with parchment paper.

Step 2: Prepare the brownie batter by mixing the eggs, oil, and water as directed on the box. Pour the batter into the prepared pan and bake until a toothpick inserted comes out mostly clean.

Step 3: Remove the brownies from the oven and let them cool completely in the pan on a wire rack.

Step 4: In a mixing bowl, beat the softened butter until smooth. Gradually add the powdered sugar, mixing well until combined.

Step 5: Add the mint extract, green food coloring, and 1 tablespoon of heavy cream to the butter mixture. Beat until smooth.

Step 6: If needed, add another tablespoon of heavy cream to reach a lighter, spreadable consistency. Beat again for a fluffy texture.

Step 7: Spread the mint buttercream evenly over the cooled brownies. Refrigerate briefly to allow the frosting to firm up.

Step 8: Heat 1 cup of heavy cream in a microwave-safe bowl until steaming but not boiling. Pour over the semi-sweet chocolate chips and let sit for 3 to 4 minutes.

Step 9: Whisk the chocolate and cream mixture until smooth to create a ganache.

Step 10: Spread the chocolate ganache over the chilled buttercream layer.

Step 11: Let the ganache set at room temperature for 45 to 60 minutes, or chill to set faster.

Step 12: Use the parchment paper to lift the brownies out of the pan. Cut into 12 even squares and serve.

Tips & Variations

For an extra minty kick, add crushed peppermint candies on top of the ganache before it sets.

Use white chocolate chips in the ganache for a sweeter, creamier topping.

If you prefer less sweetness, reduce the powdered sugar slightly in the buttercream.

Substitute mint extract with peppermint extract for a stronger mint flavor.

FAQs

Can I use homemade brownies instead of a box mix?

Yes, you can substitute any homemade brownie recipe you like. Just ensure the brownies are fully cooled before adding the buttercream and ganache layers.

How do I prevent the buttercream from melting?

Make sure the brownies are completely cool before spreading the buttercream. Refrigerating the frosted brownies briefly helps the buttercream firm up and hold its shape.