Preheat oven to 350 degrees.
Grease a 9x13 casserole dish with butter and flour. Set aside.
Chocolate Chip Cookie Dough
In a large bowl, cream together 1 cup butter, 3/4 cup granulated sugar, and 1/3 cup light brown sugar.
Mix in 2 eggs, one at a time, until fully incorporated.
Add in 1 teaspoon vanilla extract and mix again.
In a medium bowl, combine 2 1/4 cup all-purpose flour, 1 teaspoon baking soda and 1 teaspoon salt. Stir.
Mix dry ingredients into wet ingredients. Continue mixing until there are no more dry spots.
Fold in 2 cups chocolate chips.
Spread half of the chocolate chip cookie dough in the bottom of the prepared casserole dish.
Lay out a piece of freezer paper. Spread the remaining cookie dough on the paper into a rectangle, approximately the same size as the casserole dish. (wax or parchment paper may also be used)
Press another piece of freezer paper on top of the cookie dough. Refrigerate while preparing cheesecake filling.
Cheesecake Filling
Combine softened cream cheese, 2 eggs, 3/4 cup granulated sugar, and 1 teaspoon vanilla in a large bowl.
Using an electric whisk or stand mixer, mix on high until cream cheese is light and fluffy, about 3 minutes.
Fold in remaining 1/2 cup chocolate chips.
Chocolate Chip Cookie Cheesecake Bars
Spread cheesecake filling over cookie dough in casserole dish.
Remove the other half of cookie dough from the refrigerator.
Peel off one side of the freezer paper and place the cookie dough on top of the cheesecake filling. Peel off the remaining freezer paper.
Bake, uncovered, 35-40 minutes. Until golden brown.
Let cool to room temperature and the chill for at-least one hour.
Slice cheesecake bars into squares and keep refrigerated until ready to serve.