In a large bowl of a stand-mixer or with an electric hand-mixer, beat the whipping cream until soft peaks form. (This took about 6 to 7 minutes in my Kitchen-Aid mixer, using the whisk attachment.)
In a separate medium bowl, pour in the sweetened condensed milk. Add the chopped Oreos to milk and stir to combine.
Pour Oreo mixture into the whipped cream and gently fold to combine. Pour mixture into a 2 quart pan.
Slightly heat the fudge for 10 to 15 seconds in microwave (just so it's pourable but not hot) and drizzle over the cream mixture. Using a knife, gently make swirls through out the cream.
Cover tightly and freeze for 8 hours or overnight. (I always do overnight so it's really frozen.)
Serve and enjoy!