• Prepare brownie mix according to package directions. Also preheat your oven to suggested temperature for the type of pan you are using. I prepared my brownies in an 11x7 inch glass pan and heated my oven to 350 degrees.
• Grease pan and pour in half of prepared brownie mix. Unwrap 20-25 Hershey's Kisses and evenly place on top of the first layer of batter. Pour remaining batter over the top.
• Bake in the preheated oven according to package instructions for your pan, or until a toothpick inserted in the center comes out clean. Mine were done after about 35 minutes.
• Remove pan from oven and place on a wire rack to cool completely.

To prepare frosting:

• Beat together butter and sugar with an electric mixer until smooth. Add in vanilla, mint extract, and milk, and continue beating until ingredients are fully incorporated and mixture is smooth. Taste test the frosting and add more mint extract if desired.
• Stir in green food coloring, a little bit at a time, until desired color is reached. It didn't take very much since I was just trying to achieve a light green (mint) color.
• Spread frosting on top of cooled brownies and sprinkle with mini chocolate chips (if desired). Enjoy!