Preheat oven to 350°F. Spray a 9x13-inch baking dish with cooking spray.
To a medium bowl, add cream cheese, 1 cup sugar, egg yolk, and vanilla. Mix until smooth. Set aside.
Roll out a tube of crescent rolls onto the bottom of the prepared baking dish. If using the perforated dough, press the seams together lightly to seal. Crescent roll sheets would also work.
Spread the cream cheese mixture evenly over the layer of crescent rolls.
Roll out the second tube of crescent roll dough over the cream cheese layer. Press the seams together lightly.
Using a hand mixer, beat the egg white until frothy. Brush over the top.
In a small bowl, mix the remaining ½ cup of sugar and cinnamon. Evenly sprinkle this mixture over the egg white.
Bake for 25-30 minutes, or until the top is golden brown.
Remove from the oven and allow the bars to cool at room temperature for at least 30 minutes.
Once cooled, transfer the baking dish to the refrigerator. Chill the bars for at least 2 hours, up to overnight, before slicing and serving.
Serve cold.