Mix the cream cheese and sugar until light and fluffy.
Gently add in the egg yolk and vanilla.
Place one tube of crescent rolls in the bottom of an ungreased 9x13 pan.
Spread the cream cheese mixture on top.
Add the second tube of crescent rolls.
Bake in the oven for 30 minutes, or until golden brown.
Video
Notes
Try to keep the seams together, and don't worry if they don't completely touch the edges of the pan. It will puff up while baking. You can also use the new Pillsbury seamless crescent roll dough.