Mix 1st three ingredients for crust. Spread in 13x9 pan. Bake 15-20 minutes at 350°F. Cool.
Mix 1st three filling ingredients. To do this, be sure to let the cream cheese soften. Cream together with Cool Whip. Slowly add in the sifted sugar. Mix together until smooth. Once the mixture is smooth, spread it over the crust. Pour blueberry topping onto cream cheese/Cool Whip mixture.