Make and bake boxed brownie mix according to the packaged directions. Bake in a 9 x 9 baking dish with parchment paper-with extra parchment paper sticking out over the edges to lift out of the pan later. Do not over bake-check a couple minutes before 40 minutes-brownie needs to be set.

Note: When adding the extract, begin with 1/4 tsp and taste frosting. Add more if desired. (I like the 1/2 tsp-but it may be strong to others)

After brownie has cooled completely, mix mint frosting ingredients in a mixing bowl with an electric mixer, until smooth and creamy.

Spread mint frosting on top of the brownie and place in the freezer for 15-20 minutes.

After mint frosting has set in the freezer, make the ganache: heat chocolate chips and butter in a microwave safe bowl, in the microwave. Heat on 1/2 power. Stir every 20 seconds until chocolate is smooth and creamy.

Spread ganache over the mint frosting and place back in the freezer for about 20 minutes or a little more, if desired. Freezing helps with cleaner cuts when cutting the brownies (as well as wiping your knife clean between cuts).

Cut brownies store in the refrigerator.