Hi Rabbi,
Is Kraft Mac and cheese kosher? Below are the ingredients and a link:
enriched macaroni product (wheat flour, niacin, ferrous sulfate [iron], thiamin mononitrate [vitamin b1], riboflavin [vitamin b2], folic acid), cheese sauce mix (whey, milkfat, milk protein concentrate, salt, sodium tripolyphosphate, contains less than 2% of citric acid, lactic acid, sodium phosphate, calcium phosphate, with paprika, turmeric, and annatto added for color, enzymes, cheese culture).