Preheat your oven according to the instructions on the brownie mix box. Prepare your baking pan by greasing it or lining it with parchment paper for easy removal.
In a mixing bowl, combine the brownie mix with the required ingredients (typically eggs, oil, and water). Stir until just combined, being careful not to overmix. Pour the batter into the prepared baking pan and spread it evenly.
Place the pan in the preheated oven and bake according to package instructions, usually around 20-25 minutes. Keep an eye on them; a toothpick inserted in the center should come out with a few moist crumbs when they are done.
While the brownies are baking, prepare the mint frosting. In a large mixing bowl, beat the softened butter until creamy. Gradually add in the powdered sugar, mixing well. Add the mint extract and green food coloring, adjusting to your desired shade of mint green. Finally, add the heavy whipping cream, one tablespoon at a time, until you achieve a smooth and spreadable consistency.
Once the brownies are completely cooled, spread the mint frosting over the top using a spatula. Make sure to cover the entire surface for an even minty flavor.
In a double boiler or microwave-safe bowl, heat the chocolate chips with 1 cup of heavy whipping cream until melted and smooth. Stir continuously to prevent burning. Once melted, let it cool slightly before pouring it over the frosted brownies.
Refrigerate the brownies for at least 30 minutes to allow the ganache to set. Once firm, cut into squares and serve. Enjoy your delightful Mint Brownies!
