Mainly in the TV series, it is said that baked wheat cake is steamed bread, and Sun Erniang also runs a restaurant. He asked the guest officer if he wanted steamed bread. From her lines, we can see that steamed bread is stuffed and not trapped. Later, it was generally believed that steamed buns were stuffed and stuffed. But this is not absolute. There are other stuffed steamed buns in local snacks. Steamed bread was more expensive at that time. If Wu Dalang sells steamed bread, maybe Wu Dalang will be richer. It can be seen that Wu Dalang doesn't sell steamed bread.
Indeed, it can be considered that the sesame cakes sold in Wu Dalang are steamed cakes. Because Wu Dalang was in the Northern Song Dynasty, Zhao was really the king of the imperial court at that time. However, the steamed characters of steamed cakes are homophonic with those of Zhao Haoqi Zhen, so as to avoid the name of king. People will use other words instead, so it is very possible for Wu Dalang to change steamed cakes into sesame cakes. Because the king's taboo can't be vilified, most poor people will change it in order not to cause trouble. If you think that the sesame seed cakes sold in Wu Dalang are sesame seed cakes, I think it is impossible, because sesame seed cakes need to be baked in a blast furnace, but I didn't see the blast furnace in Wu Dalang.
To sum up, the sesame cakes sold in Wu Dalang are probably steamed cakes, because steamed cakes were not particularly precious at that time. Wu Dalang sells baked wheat cakes just for living, and baked wheat cakes are generally made like big round baked wheat cakes in TV series. This is not quite consistent, which is also the reason why TV plays are deceptive.