Preheat oven to 350°F. Grease the bottom of a Good Cook 9×13-inch baking pan with nonstick baking spray. Set aside.
In a large bowl, mix together all four packets of Peanut Butter Cookie Mix, melted Challenge Butter, and one egg. Add in chocolate chips, and press one half of the mixture into the prepared baking pan.
In a stand mixer or large bowl, beat together Challenge Cream Cheese, powdered sugar, two eggs, and vanilla. Drizzle this mixture on top of the cookie crust. Use a spatula to spread cream cheese mixture evenly across the pan.
Add flour and granulated sugar to the remaining cookie dough. Mix together until crumbly. Sprinkle this mixture over the top of the cream cheese layer, covering the cream cheese with the crumbled cookie dough. Bake for 35-45 minutes, or until the edges of the cookie bars are golden brown and the center is no longer jiggly.
Remove and allow to cool completely before slicing. Cool the bars in the fridge for best results.
If desired, top with ice cream, chocolate sauce, and caramel sauce.
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