Today, July 7, 2013 is National Chocolate Day What is your favorite chocolate? Dark chocolate contains more iron, ounce for ounce, than beef - a lot more! A 3 oz. portion of cooked ground beef (70% lean meat, 30% fat) contains 2.11 mg of iron, while 3 oz. of dark chocolate boasts 10.12 mg. It is also National Macaroni Day Do you like macaroni?