4 eggs
1 lg. can (16 oz.) evaporated milk
2 c. pumpkin (1 - 16 oz. can)
1 1/2 c. sugar
1 tsp. cinnamon

Mix in order. Pour into 9"x13" greased cake pan. Sprinkle 1 package of yellow (or spice) cake mix on top. Dribble 1 cup of melted butter on top. Sprinkle 1 cup of chopped walnuts on top. Bake at 350 degrees for 1 hour (50 to 60 minutes). Use toothpick test to see if it's done. Serve in squares with Cool Whip.