Preheat oven to 350 degrees F. Grease 9x13-inch baking dish.
In a large mixing bowl using an electric mixer, cream together butter, sugar, and brown sugar until light and fluff.
Add eggs and vanilla. Mix in baking soda, salt, and flour just until combined.
Stir in chocolate chips.
Spread 2/3 of the cookie dough into the bottom of the baking pan.
In a medium mixing bowl using an electric mixer, beat together cream cheese, sugar, and vanilla extract until the mixture is smooth.
Spread the cream cheese mixture over the cookie dough in the baking pan.
Drop the additional cookie dough by spoonfuls over the cream cheese layer in the baking pan. Do not spread.
Sprinkle an additional 1/2 cup of chocolate chips over the top.
Bake uncovered for 35-40 minutes until filling is set and the top is golden brown.
Cool completely before cutting into squares.