Preheat the oven to 350°F. Spray a 9x13 inch baking dish with cooking spray and line with parchment paper. Set aside.
In a large bowl, beat together the sugar cookie mix, melted butter, egg, all-purpose flour, quick oats and ground cinnamon with a stand mixer or hand mixer.
Spoon ¾ of the mixture into the prepared baking dish and press it into the bottom. Set the rest of the sugar cookie mixture aside.
In a large bowl, stir together the cranberries, sugar, cornstarch, ground cinnamon and cranberry juice.
Spread the cranberry mixture evenly on top of the crust layer in the baking dish.
Sprinkle the remaining crust mixture evenly over the cranberry mixture.
Bake for 35 to 40 minutes or until the topping turns golden brown and the filling is bubbling.
Let cool for at least 10 minutes before cutting into squares and serving or let cool completely and serve at room temperature.