Mix flour with baking soda. Combine butter, the sugars, pudding mix, and vanilla in a large mixing bowl; beat until smooth and creamy. Beat in eggs. Gradually add flour mixture then stir in chips. (Batter will be stiff.) Drop from tablespoon onto ungreased baking sheets, about 2 inches apart. Bake at 375 degrees for 8-10 minutes. Makes about three dozen.