Ooey Gooey Bars

0 Preheat oven to 350°F. Spray a baking 9"x13" baking dish with nonstick cooking spray, and set aside.
Make the brownie layer. 
1 Mix [wprm-ingredient text="15.25 oz. chocolate cake mix" uid="1"], the melted [wprm-ingredient text="8 tablespoons unsalted butter" uid="2"] and [wprm-ingredient text="1 egg" uid="3"] together to create the bottom layer of the bar.
2 Pour the mixture into the prepared baking dish and flatten. This should take a little while since the mixture is THICK and not very liquid-y.
Make the cheesecake layer. 
3 Mix together [wprm-ingredient text="8 oz. cream cheese" uid="5"], the other [wprm-ingredient text="2 eggs" uid="6"], the softened [wprm-ingredient text="4 tablespoons unsalted butter" uid="7"], [wprm-ingredient text="¼ cup unsweetened applesauce" uid="8"] and [wprm-ingredient text="1 teaspoon pure vanilla extract" uid="9"] until smooth with a hand mixer in a large bowl.
4 Pour the [wprm-ingredient text="1 lb. powdered sugar" uid="10"] in gradually, stirring until the wet ingredients are completed blended and combined.
5 Pour on top of bottom layer in the pan.
6 Sprinkle [wprm-ingredient text="¾ cup bittersweet chocolate chips" uid="11"] on the surface of the top layer.
7 Bake for 40 to 45 minutes, or until top is golden brown.
8 Let cool for 30 minutes, then slice into individual bars and enjoy!