Pre heat the oven to 350
Spray baking dish or cast iron skillet with spray oil.
Mix pumpkin pie mix, with evaporated milk, and both eggs. (If using pumpkin puree add 2/3 cup of sugar and 1 tablespoon of cinnamon.
Whisk until fully combined.
Add the pumpkin mixture to the baking dish or cast iron pan.
Open the cake mix, and sprinkle entire cake mix on top of the pumpkin mixture covering it completely.
Place all of the butter slices on the top of the cake mix.
Place skillet into the oven and bake on 350 for 45 minutes.
Allow to cool for about 14 to 20 minutes.
Enjoy with some ice cream, or whipped cream.