Preheat oven to 350 degrees F. Spray a 9x13 pan with cooking spray. Set aside.
Make the crust:
Pulse graham crackers in food processor to make crumbs.
2 cups graham cracker crumbs
In a medium-sized mixing bowl combine graham cracker crumbs, sugar and melted butter. Spread graham cracker mixture on the bottom of the baking pan and flatten with the bottom of glass to form a crust. Bake for 5-7 minutes. Remove from oven and let cool.
1 Tablespoon granulated sugar, 8 Tablespoons unsalted butter
While the crust is cooking make the cheesecake layer.
In a stand mixer mix cream cheese and powdered sugar until combined.
16 ounces cream cheese, 2 cups confectioner’s sugar
Gently mix in whipped topping.
1 cup whipped topping
Carefully spread the cheesecake mixture on top of the crust.
Set in refrigerator while you make the pumpkin layer.
Make the pumpkin layer.
In medium-sized mixing bowl combine half and half and vanilla pudding. Mix until it thickens.
1 1/4 cup half and half, 4 ounces instant vanilla pudding
Add pumpkin and pumpkin pie spice and mix until combined.
15 ounces can pumpkin puree, 2 teaspoons pumpkin spice
Gently fold in 1/2 cup cool whip.
1/2 cup Cool Whip
Spread on top of the child cheesecake layer.
Finally, add 8 oz. of Cool Whip. Sprinkle with chopped nuts.
8 ounces Cool Whip, pecans
Refrigerate 1-2 hours.