On a surface that has been lightly floured, roll out the prepared puff pastry. It ought to be roughly 12" by 12". Your pastries will be roughly 4" × 12" after being divided lengthwise into three parts.
Until the cream cheese is smooth and creamy, whisk it at a high speed. All-purpose flour, vanilla, eggs, and powdered sugar should be added. Stir thoroughly to ensure that all lumps are gone. Cut a corner out of a plastic bag and transfer the cream cheese mixture into it or a piping bag.
Add one egg white and around two teaspoons of water to a small mixing dish. Stir thoroughly.
Taking your piping bag that has been filled with your cream cheese mixture, pipe a thick line down the center of the first prepared puff pastry. When your line of cream cheese is finished begin folding in thirds taking one side of your puff pastry and folding it on top of your cream cheese. Brush the top of your first fold with egg wash, as well as the remaining third that you have still to fold. Once brushed with egg, fold your remaining third on top of the already folded and cream cheese line. Each pastry roll should be cut into four slices diagonally. Place each section of pastry onto a lightly greased cookie sheet. Bake at 400° for 15 to 25 minutes.
As each oven varies, be careful to set the timer for a shorter amount of time and check it every five minutes to determine when it is finished.
You can top your rolls with some melted butter or powdered sugar when they have slightly cooled. Alternatively, you can make a glaze by combining some milk and powdered sugar, stirring until combined, and then adding additional powdered sugar or milk to achieve the desired glaze thickness. Dispense and savor!