Mix together:

1 dry yellow cake mix
1/3 c. butter
1 egg

Save out 1 cup of mixture and spread rest of mixture in 9x13 pan.

FILLING:

1 lg. can pumpkin
2 eggs
1 can evaporated milk
1/2 c. sugar
1 tsp. cinnamon
1 tbsp. pumpkin pie spice

Pour over cake mixture. Sprinkle on top:

Remaining 1 c. cake mixture
1 c. sugar
1/4 c. butter
1 c. nuts

Mix and crumble on top of pumpkin. Bake at 350 for 45-50 minutes. Serve with whipped cream.