Preheat the oven to 350 degrees.

In a large bowl combine the cake mix, pumpkin puree, and egg. Mix well to combine. The batter will be thick.

Spread the pumpkin mixture in a 9 x 13 glass baking dish sprayed with cooking spray.

Layer the white chocolate chips, cinnamon chips, then the pecans on top of the pumpkin layer.

Carefully top the cookie bars off with the sweetened condensed milk, making sure to cover the entire pan.

Bake for 30 minutes.

Remove from oven and cool completely on a wire rack.

Cut into 18 cookie bars.