In a large bowl, whisk together the pumpkin puree, evaporated milk, brown sugar, eggs, and pumpkin pie spice. Pour the mixture into a greased 9x13 inch casserole dish.
Sprinkle the cake mix evenly over the pumpkin mixture, then top with the chopped pecans, and lastly pour the melted butter over the top.
Bake at 350℉ for 50 to 60 minutes, until the cake is golden brown.
Allow to cool completely before serving.
Notes
Calories are automatically generated. For best results calculate based on your exact ingredients.