Crush the Oreo cookies in a zip-top bag using a rolling pin, leaving some chunks and aiming for finer crumbs.

Whip the cold heavy cream in a mixing bowl on high speed until stiff peaks form (about 3-5 minutes).

Fold the sweetened condensed milk into the whipped cream gently, then add the crushed Oreos and mix carefully.

Pour the mixture into a freezer-safe container, sprinkle remaining crushed Oreos on top, and freeze for at least 6 hours.