Preheat oven to 330°F.
Sift flour, baking soda and salt into a large bowl and set aside.
Combine butter, brown sugar and powdered sugar in a separate bowl and cream with electric mixer until fluffy.
With mixer running, add eggs, one at a time, then add vanilla. Mix until combined, scraping sides of bowl.
Slowly add flour mixture, scraping sides of bowl.
Stir in chocolate chips.
Scoop 1 tablespoon dough for medium cookies and 2 tablespoons for large onto ungreased baking sheet.
Bake until light golden, 10 to 12 minutes for medium cookies, 12 to 14 minutes for large.
