PREHEAT oven to 375° F.
SPREAD pie filling into ungreased 13 x 9-inch baking dish. Sprinkle 1/4 cup morsels over filling. Place cookie mix into large bowl. Cut in butter with pastry blender or two knives until mixture is crumbly. Stir in remaining 3/4 cup morsels. Sprinkle mixture over filling.
BAKE for 20 to 25 minutes or until bubbly around edges and topping is lightly browned. Serve warm. Top with whipped topping, if desired.