Preheat the Oven:
Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish.
Make the Pumpkin Layer:
In a large bowl, whisk together the pumpkin puree, evaporated milk, eggs, sugar, cinnamon, ginger, nutmeg, cloves, and salt until smooth and fully combined.
Pour the pumpkin mixture into the prepared baking dish.
Add the Cake Mix and Pecans:
Sprinkle the dry cake mix evenly over the pumpkin layer. Do not mix it in; just make sure it’s spread in an even layer.
Sprinkle the chopped pecans (or walnuts) evenly on top of the cake mix.
Add the Butter:
Drizzle the melted butter evenly over the top of the cake mix and pecans. Try to cover as much of the surface as possible.
Bake the Cake:
Bake in the preheated oven for 50–55 minutes, or until the top is golden brown and the pumpkin layer is set.
You can insert a toothpick or knife into the center, and it should come out mostly clean (some moist crumbs are okay).
Cool and Serve:
Let the cake cool for at least 30 minutes to allow the pumpkin layer to set fully.
Serve warm or chilled, topped with whipped cream or a scoop of vanilla ice cream if desired.