While you're waiting on the chocolate mix to cool, place the oreo cookies in a food processor and pulse into crumbs. Set them aside. In a large bowl, beat the cream cheese with a hand mixer until fluffy. Then beat in the melted chocolate mixture, vanilla extract and 3/4 cup of the confectioners sugar. Use a rubber spatula to fold in 1 1/2 cups of oreo crumbs and to scrape the sides as needed.