Add the pumpkin, eggs, milk, sugar, and spices to a stand mixer, mixing well. Next, mix in the cake mix and butter. If you choose to use nuts, mix those in at this point as well.
Pour the mix into 2 greased 9-inch round cake pans.
Bake for 1 hour or until a toothpick inserted in the middle of the cake comes out clean.
Once baked, let them cool completely.
Carefully remove and release them from the pan, once they are fully cooled.
When cooled, add a thin layer of frosting on top of one cake, then place the other cake on top of the icing making a 2 layer cake.
Use a Wilton 1M tip and decorators bag to frost the cake, filling the bag with the Cream Cheese Frosting. I would advise frosting just the top portion otherwise it makes it too sweet. Think of it as a crumb coat.
Serve immediately or serve chilled.
Notes
This can easily be made gluten-free with a gluten-free mix, be sure to check all ingredients before serving.It's best served chilled.