Grease a 12x15 pan.
Use one can of crescent rolls for bottom of pan.
Mix together the cream cheese, sugar, vanilla and egg yolk.
Spread mixture over crust.
Roll out second can of crescent rolls and spread over the cheese mixture.
Brush with beaten egg white.
Sprinkle with topping.
Bake at 350 degrees for 30 to 35 minutes.