Preheat the oven to 300 degrees.

Grease a nine-by-13-inch baking dish with butter, and set it aside.

Add the cake mix, softened butter and one egg to a mixing bowl, and beat until it’s well combined.

Press the mixture evenly into the bottom of the prepared pan.

Add two eggs, melted butter, sugar and cream cheese to a mixing bowl (you can use the same one), and beat until it is smooth.

Pour the mixture evenly over the bottom layer, and sprinkle the top with all of the pecans, pressing them lightly into the batter.

Bake for one hour or until the top is set and a toothpick inserted into the center comes out with only wet crumbs (think cheesecake consistency).

Let the bars cool completely before cutting.

Store them in an airtight container in the refrigerator.