The raw materials needed to make sugar were quite hard to get. At present, "Drondheim" could only mix honey and date palm to make original mixed sugar cubes. There was no technology to make higher-level sugar.
For example, maltose, which could be produced from wheat, but no one knew how to make this kind of sugar.
As for other sugar such as white sugar and brown sugar, they needed to be extracted from the beets, sugar cane and other plants that were rich in sugar. Of course, according to the research of the Sarradian, if date palm was refined, perhaps rough sugar such as brown sugar could be obtained. However, it had not been thoroughly studied, so brown sugar did not appear.