Preheat your oven to 350°F (175°C) to ensure even baking.
In a mixing bowl, combine the pumpkin puree, sugar, cinnamon, and evaporated milk until smooth and well blended.
Pour the pumpkin mixture into a greased 9×13 inch baking dish. Sprinkle the chopped pecans evenly over the top.
Evenly distribute the dry cake mix over the pumpkin and pecan layers. Do not stir; this layering creates the cobbler texture.
Drizzle the melted butter over the top of the cake mix layer. This creates a crispy topping as it bakes.
Place the baking dish in the preheated oven and bake for approximately 50-60 minutes, or until the top is golden brown and the cobbler is set.
Allow the cobbler to cool for a few minutes before serving. Pair it with ice cream or whipped cream, if desired.