Preheat the oven to 350 degrees F. Line a 9 X 13 inch baking dish with foil and liberally coat with nonstick cooking spray.
In the bowl of an electric mixer, beat the softened butter with both sugars until light and fluffy, about 2 minutes. Add the eggs, vanilla, salt, and baking soda. Mix well, then scrape the sides of the bowl with a spatula.
Turn the speed to low and add the flour. Beat to combine, then mix in the chocolate chips.