After kneading a pack of Jeonghan flour called Gasuger and two roots of white sugar with eight eggs, put it in a copper pot and cook it over charcoal until the color becomes yellow
It is made by drilling a hole with a bamboo needle so that the fire energy can enter the inside, taking it out, cutting it, and eating it, and this is the best product
Description of
Lee Deok-moo was a sweet mania enough to admit himself, but among the writings, he even left a letter to his friend asking him to scold him, saying that he ate sweets three times when he was with him and secretly ate snacks he received 
Records of Yi Gi-ji who went to the Qing Dynasty as an entourage and visited the Catholic Church and was treated with castella
Westerners invited me to sit in another room…… He refused to serve me a meal, so I served 30 Western rice cakes
The shape was similar to that of Korean Bakgye, which is made by kneading sesame oil and honey into flour, cutting it into a rectangle, and writing “Jungbakgye Jung-jung” in Chinese characters as the snack of the earthquake Joseon Dynasty
It was soft and sweet, and it melted as soon as it went into my mouth, so it was a strange taste When I asked him how to make it, he said he would make it with sugar powder and egg flour 
In addition, several Castella narratives from the Joseon Dynasty appeared, and due to the identity of foreign food and the characteristics of Joseon, where sugar and flour were both luxury goods, it was not easy to eat
So, everyone who has tried this Western rice cake called “Singer Jera” or “Seolgo” for Eumcha is highly praised
In Japan, where Castella was introduced for the first time, there was only the advantage of being able to make it without an oven, but for this reason, it was also used as a snack for powerful people or as a treat for foreign envoys
There is a record that Joseon news agencies were also treated with castella, which was the most popular snack, and when Castella disappeared from the menu due to financial problems on the way, they were upset, asking why the treatment was like this