Preheat oven to 350 degree. Prepare crust by adding the butter and flour to a bowl and blend using a large fork or pasty blender. Add chopped pecans and mix.
Press mixture into the bottom of a 9 x 13 inch pan. Bake at 350 degrees for 18-20 minutes or until light golden brown. When done remove from oven and let cool. While the crust is cooling prepare the filling.
Prepare dream whip according to package directions, whip until soft peaks form then set aside. Mix the cream cheese and powdered sugar together using a electric mixer.
Add prepared dream whip to cream cheese mixtures. When the crust is completely cooled add the cream cheese filling on top of the crust and spread evenly.
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