Mix together cream cheese and powdered sugar, then mix in Cool Whip and cake. Put in 9 x 13 pan and top with blueberry pie filling. Refrigerate. Best if made 1-2 days ahead. Serves 8-12.
Heat oven to 325°F. In ... x 13 pan. Beat cheese until smooth. Beat in sugar ... Add vanilla. Spoon blueberry pie filling over crust. Pour ... minutes. Chill 2 hours.