Ingredients:

Crust
1 cake mix (white or yellow)
1/2 cup melted oleo
1 egg 

Filling
2 2/3 cup pumpkin
4 eggs
3/4 cup brown sugar
3/4 tsp. salt
2 tsp. cinnamon
1 tsp. nutmeg   
1 can evaporated milk

Procedure:

Whip together eggs & oleo.  Pour over cake mix and crumb together.Reserve one cup for topping.Place the rest in 13x9 cake pan & press into bottom for a crust. Mix all the filling ingredients together.  Pour over the crumb crust.Spoon on the  reserved cup of crumb topping.Bake at 350 degrees for 40-50 minutes or until knife inserted comes out clean.Serve with whipped topping.