Oven: Preheat to 400 °F. Use Silpat or parchment paper to cover a baking sheet. Mix 6 oz. of room temperature cream cheese, 1/4 cup of granulated sugar, and 1 teaspoon of the whisked egg until smooth in a bowl. The cream cheese mixture should be put into a ziplock bag or piping bag.
Place one sheet of puff pastry on your work surface, lightly coat the top with flour, and roll out to a size of 12 inches by 12 inches. Cut it into three equal strips; each should measure 4 x 12 inches.
Pipe the cream cheese filling into the center of each strip, lengthwise, by snipping the tip of the piping bag with the filling and leaving a 12 inch opening. Don't overlap the pastry too much or the bottom will end up doughy. Fold over one side, brush egg wash along the border of the other side, and fold over to seal. Place it on the baking sheet with at least 12 inch between each cheese roll after flipping it over and diagonally trimming the ends. Repeat with the second puff pastry sheet. There should be 12 cheese rolls left over.
Each cheese roll should be covered in egg wash before being dusted with sugar crystals (granulated sugar can be used in their place if you don't have sugar crystals). They should bake for 20 to 25 minutes at 400°F until golden brown. Serve them after they have totally cooled. Enjoy!