Blend together 1st layer ingredients and press into an ungreased 9x13 baking dish. Bake at 375 degrees for 20 minutes.
Cream together 2nd mixture and spread onto cooled crust.
Mix together 3rd layer ingredients and spread on next.
Top with Cool Whip and sprinkle with chopped pecans.
Variations:
Coconut Layer dessert: use 2 instant coconut cream pudding mixes as filling layer. Top with whipped cream and ½ cup flaked coconut, toasted.
Cherry Layer dessert: use 2 cans cherry pie filling as a layer. Top as usual.