Step 1

Preheat oven to 350° F.

Step 2

In a medium mixing bowl, combine the pumpkin puree, evaporated milk, eggs, sugar, pumpkin pie spice, and vanilla. Mix until ingredients are thoroughly combined.

Step 3

Pour into a greased 9x13 inch pan.

Step 4

Sprinkle the dry cake mix evenly over the mixture in the pan. Melt the butter and drizzle evenly over the dry cake mix.

Step 5

Bake at 350° for 1 hour. Let stand to cool for at least 30 minutes, then serve with whipped cream or vanilla ice cream as desired.