Preheat oven to 400ºF (200ºC), and prepare two cookie sheets with parchment paper. In a bowl, mix cream cheese, sugar, and vanilla until fully combined. Lightly flour the surface and roll out puff pastry on top to flatten. Cut each sheet of puff pastry into 9 equal squares. On the top right and bottom left of the pastry, cut an L shape approximately ½ inch (1 cm) from the edge.