Heavenly Pumpkin Cheesecake and Layered Mousse Dessert

Preheat oven to 350 degrees F (175 degrees C).

In a medium mixing bowl combine flour, butter, and 1/2°C finely chopped pecans. Thoroughly combine and then press mixture thinly into a 9 X13 inch baking pan.

Bake in preheated oven for 15 minutes. Set aside to cool.

In a medium mixing bowl, combine cream cheese, 2°C of the whipped topping, confectioners' sugar and vanilla extract. Beat until smooth. Spread evely over cooled crust.

In a large mixing bowl combine pudding, milk, pumpkin puree, pumpkin pie spice, and 2 more cups of whipped topping. Mix until thoroughly combined. Spoon mixture over cream cheese layer. Top with remaining 1°C of whipped topping. Sprinkle with 1/2 chopped pecans, if desired. Chill at least 1 hour before serving.