Start by ensuring all your ingredients are chilled. Place your mixing bowl and beaters in the refrigerator for about 20 to 30 minutes.
Once chilled, pour the heavy whipping cream into the mixing bowl. Using an electric mixer, whip the cream on medium speed until stiff peaks form.
Pour the sweetened condensed milk and chocolate syrup into the whipped cream. Gently fold them in.
Pour the mixture into a freezer-safe container, cover, and freeze for at least four hours.
Scoop out and enjoy! Let it sit for a few minutes if it's too hard.