In a medium mixing bowl, combine the pumpkin puree, evaporated milk, eggs, sugar, pumpkin pie spice, and vanilla. Mix until ingredients are thoroughly combined.
Pour into a greased 9x13 inch pan.
Sprinkle the dry cake mix evenly over the mixture in the pan. Melt the butter and drizzle evenly over the dry cake mix.
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.
Notes
Recipe Variations
Use any flavor of cake mix, such as spice, white, or pumpkin
Substitute brown sugar for granulated sugar or use a combination of the two
Substitute cinnamon for the pumpkin pie spice
Adjust the sweetness by adding less sugar (according to taste)