In the large bowl of an electric mixer with whisk attachment, beat cream on high speed for several minutes, just until stiff peaks form
While whipping cream, in a separate large bowl, stir together sweetened condensed milk and vanilla; stir in Oreos
In a separate small bowl, combine brown sugar, melted butter, cinnamon; set aside
Once cream is ready, fold it into sweetened condensed milk mixture
Pour half of ice cream into a regular-sized loaf pan and drop half of brown sugar mixture over top; top with remaining ice cream and top with remaining brown sugar mixture; wrap well with seran wrap or tin foil