So, creating a few kilograms of sugar for personal use would suddenly cause problems for the farmers in the kingdom? What nonsense. If sugar is expensive, it means there aren't lots of people manufacturing it. In the end if the technology and resources (plants) to make sugar do exist, it's, in fact, not particularly expensive since it's easy to make in large quantities. If the plants and technology don't exist, you don't, in fact, even have sugar available. You'd have honey and other such stuff, which indeed are expensive and come in relatively small quantities.
@okami Lots of people like pudding. Ellen must have been a fan of it back in her original world. Of course she would miss it. Just like chocolate and a whole lot of other sweet things.