Preheat Oven to 350° F and spray Loaf Pan with Non-Stick baking Spray.
In a bowl add Cake Mix, Instant Pudding, Brown Sugar, Cinnamon, and All Spice. Sift all dry ingredients into another bowl.
Then Add in the Water, Vegetable Oil, Eggs and Vanilla Extract with the dry ingredients and mix using a hand mixer for 5 minutes until everything is well combined.
Using a Specula, gently fold the Pumpkin Puree into the cake batter until you see the color change to orange.
Add Batter into a greased loaf pan and bake for 45 minutes. To see if the cake is done, try sticking a toothpick in the center of the cake. If the toothpick comes out clean with no wet batter on it, then it's done. If there's batter on the toothpick allow additional 15 minutes.