Brownies:
Mix brownies according to package directions. Bake in a preheated oven for 25-35 minutes. Cool completely.
Mint Frosting:
Mix powdered sugar, mint extract, butter, milk, and green food coloring. Beat until smooth. Spread over the top of cooled brownies.
Chocolate Glaze:
Melt butter and chocolate chips in a glass bowl in the microwave, stirring gently after 30 seconds. Cook for another 30 seconds and stir until smooth. Spread immediately over frosted brownies. Tap pan lightly to spread and smooth glaze. Refrigerate to set glaze.
Heavenly. I use a little less butter, though, because recipe calls for a TON of butter.