Chill a metal bowl for 10-15 minutes in your freezer.
Using a handheld mixer, whisk the whipping cream until stiff peaks form.
Add the peppermint/mint extract. Slowly drizzle in the condensed milk while mixing on a low speed.
Don't over mix. The whipping cream will deflate. Just incorporate the condensed milk into the mixture.
Lastly, add the chocolate chips and mix through just briefly.
Transfer to a freezer-safe container, cover and freeze for 6 hours.
Roughly pulse the chocolate chips in your food processor until the chips are crumbled. You can leave the chocolate chips whole if you prefer.I grated some chocolate on top just before serving. This is completely optional.