In a large mixing bowl, whip the heavy cream with an electric mixer on medium-high speed until stiff peaks form. This should take about 3-5 minutes.
In a separate bowl, combine the sweetened condensed milk, peppermint extract, and a pinch of salt. If using, add green food coloring to achieve your desired minty hue. Mix until well combined.
Gently fold the whipped cream into the condensed milk mixture using a spatula, being careful not to deflate the whipped cream.
Once fully incorporated, fold in the chocolate chips, reserving a few for topping if desired.
Pour the mixture into a freezer-safe container, smoothing the top with a spatula.
Sprinkle the reserved chocolate chips on top as a garnish.
Cover the container with a lid or wrap tightly with plastic wrap, and freeze for at least 6 hours or until completely set.
Notes
Serve in chilled bowls topped with fresh mint leaves and additional chocolate chips.