Heat oven to 350 degrees. Combine sugar and butter in large bowl. Beat at medium speed, scraping bowl often, until creamy. Add eggs, chocolate and vanilla; continue beating, scraping bowl often, until well mixed. Reduce speed to low; add flour, baking powder and salt. Beat until well mixed. Stir in oats and chocolate chips by hand.
Drop dough by rounded tablespoonfuls, 2-inches apart, onto ungreased cookie sheets. Bake for 12 to 15 minutes or until set. Do Not Overbake.