preheat the oven to 350°
butter or grease a 9x13 baking pan, set aside
mix the pumpkin, sugar, cinnamon, vanilla, and milk together
add the eggs and whisk gently to incorporate them, knock the bowl on the counter to pop and air bubbles
pour into the baking dish
sprinkle the cake mix on top of the pumpkin layer, gently press down with your hand to pat it in
sprinkle with chopped pecans
drizzle with the melted butter trying to cover as much as the cake mix as possible
do not stir it place it directly in the oven
bake at 350° 60 minutes or until the pumpkin layer is no longer soupy and jiggly and the pecans are lightly browned
cool completely and serve with ice cream, whipped cream, or cool whip