Preheat oven to 350°F. Prepare a 9”x13” baking pan with nonstick cooking spray.
In a large bowl, combine pumpkin, evaporated milk, eggs, brown sugar, pumpkin pie spice and salt. Pour into prepared pan.
In the same bowl, combine butter and cake mix. Stir until combined, then spoon dollops over pumpkin mixture to create an even layer.
Sprinkle graham cracker and pecans over cake layer.
Bake 50-55 minutes, until lightly browned on edges and slightly jiggly.
Allow to cool, then serve and refrigerate leftovers.
