Corn syrup is made commercially by acid treatment of cornstarch. It is mostly dextrose (glucose). I have corn sugar, however. If I make a syrup of that wouldn't it be the same thing?
My reason for this is that Karo light corn syrup has high fructose corn syrup mixed in to make it more sweet, and Karo and organic corn syrups have a bit of vanilla in them (why?). I just want the pure product.