Preheat oven to 350 degrees F.
Unroll 1 package of crescent rolls onto a cookie sheet. Keep the crescent rolls together and pinch the seams together to make one large rectangle.
With a mixer, cream softened cream cheese, white sugar, and vanilla extra until smooth and lump free.
Spread the cream cheese mixture over the crescent rolls, almost to the edge.
Roll the other package of crescent rolls on top of cheese mixture, pinching the seams together to make a solid sheet.
Seal all four edges with a fork. Whisk egg yolk and brush on top; sprinkle with brown sugar.
Bake in a preheated oven for 25 minutes.
Remove and let cool completely. Refrigerate overnight.
Once chilled, cut off the edges, and then cut into desired shapes - rectangles or squares.