Line a 9 x 13 inch pan with waxed paper. Melt 2 sticks butter and cool. Mix together:

1 lg. can pumpkin
1 lg. can evaporated milk
1 c. sugar
3 eggs
1/2 tsp. cinnamon

Pour into pan. Top with 1 box yellow cake mix (Duncan Hines). Put 2 cups chopped nuts over mix. Pour cooled butter over nuts. Bake 50-60 minutes at 350 degrees. Turn out on tray - peel off paper.

FROSTING:

1 (8 oz.) cream cheese
3/4 c. Cool Whip
1/2 c. powdered sugar

Frost pumpkin cake and refrigerate.