what is corn syrup
Dark corn syrup in commercial packaging. Corn syrup is a food syrup which is made from the starch of maize (called corn in some countries) and contains varying amounts of maltose and higher oligosaccharides, depending on the grade. Dark corn syrup is a combination of corn syrup and molasses (or Refiners' syrup), caramel color and flavor, salt, and the preservative sodium benzoate. 2  Dark corn syrup is a warm brown color and tastes much stronger than light corn syrup.