Preheat the oven to 350º Fahrenheit and grease a 9x13 pan with butter or cooking spray.
In a large bowl, mix together the butter and sugar. Mix well.
Add the eggs and mix again.
Add the pumpkin and milk. Mix again.
Add the salt, cinnamon, pumpkin pie spice and cake mix. Mix until well combined, scraping the sides of the bowl as needed.
Pour the pumpkin batter into the prepared pan.
Sprinkle the pecans over the batter.
Then sprinkle the brown sugar over the pecans.
Bake for 40-45 minutes or until a knife inserted in the center comes out clean.
Check the cake at about 45 minutes while baking. If it is getting too brown, cover with foil for the remainder of baking.
Serve warm with ice cream or whipped cream.
The calories shown are based on the cake being cut into 15 pieces, with 1 serving being 1 slice of cake. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**