Strawberry, Cream Cheese and Cake Makes Up Delicious Dessert

White cake mix - mix as directed on box (use egg whites only)
Pour into greased jelly roll pan and bake

Filling:
11 oz cream cheese; softened
1 cup sugar
8 oz cool whip
1 tsp vanilla

Beat cream cheese and sugar together. Fold in Cool whip and vanilla until smooth.
Pour onto cooled cake