Preheat oven to 350°F and lightly grease a 9x13-inch baking dish.
Measure out ½ cup of the cake mix and set aside for topping.
Mix remaining cake mix, oil, and 1 egg until well combined.
Press into the prepared dish to form a crust.
Bake 15 minutes.
While crust bakes, mix cream cheese, sugar, and remaining 2 eggs until smooth.
Spread filling over the prebaked crust and top with pecans and the reserved cake mix.
Bake 15-18 more minutes, then cool completely before slicing.
