This.Is.So.Good.
1 can of pumpkin
1 can evaporated milk
1 cup sugar
1 tsp vanilla
1/2 tsp cinnamon
1 package of yellow cake mix
1/2 cup butter, melted
1 cup chopped pecans, optional
Mix together the first five ingredients and pour into a greased 9 x 13 casserole. Sprinkle cake mix evenly over the top, then drizzle butter evenly over that, then pecans if you are using them.
Bake at 350 for about an hour, until golden brown. Let it cool about 10 minutes or so before serving. Great with whipped cream.