Line a baking pan with parchment paper. Cut it so it perfectly fits on the bottom and dab the corners with melted chocolate so it stays in place. Allow to set (just a few minutes).
Melt chocolate chips in a microwave safe bowl. Melt in 30 increments, stirring at each stop, repeat until smooth. Drop 1/4 teaspoon peppermint extract in and stir. Adjust to taste–add the remainder 1/4 teaspoon if it is not strong enough.
Slowly pour HALF (or less)as the bottom layer into the pan. You want a thin layer so go slowly. Using the back of a spoon or the shake method, make sure it is evenly spread. Freeze for 2 minutes. Make sure it does not freeze completely!!! You don’t want 3 separate layers that fall apart but you also don’t want the chocolate layers to blend into it each other. Watch for the color of the top–when it is no longer shiny is a good indicator you’re ready for the next layer.
While you are flash freezing the first layer, melt the white chocolate chips in the same way in the microwave. Drop food coloring in, stir until smooth. Pour green chocolate for the thin 2nd layer. Shake until evenly spread. Freeze the candy for 2 minutes or until no longer shiny.
. Repeat with 3rd chocolate layer. If you need to reheat your chocolate because it is hardening a little, place back in the microwave for 10-20 seconds. Freeze 2-5 minutes. Before it sets completely, using a knife, slice the shapes of your mints. I went for the classic rectangular shape. Allow to set until dry, either on the counter or in the freezer (if you are less patient