Start by combining your cake mix, eggs, and oil. Beat until smooth. Pour batter into an 8-inch x 8-inch square greased cake pan. THIS MAKES A TALL CAKE. Bake according to box instructions. Let cool. Using a utensil, poke holes throughout the cake two inches apart. Pour sweetened condensed milk all over the cake and refrigerate for one hour. In a large mixing bowl combine the cream cheese, butter, vanilla, and powdered sugar and beat until smooth. Add in the crumbled Oreos and mix until well combined. Spread evenly over cake. Top with remaining Oreos. Refrigerate for 2 hours. Serve and Enjoy!