In the past, the Royal Household served as the primary source for home economics, cooking, needlework, and Thai manners.
The royal ladies in the palaces rigorously trained their ladies-in-waiting; therefore, many upper-class families took their daughters there so that they would learn to cook and to do other household chores, and thus be prepared for marriage and family life. The royal palace's home economics expertise has since proliferated.
After the country's change in 1932 from an absolute monarchy to a constitutional monarchy, during the reign of King Rama VII, the old and new generations of the Royal Household maids moved out of the palaces. Some modified and applied what they learned to earn money to support themselves or their families.
Some foreign dishes on the royal menu have been modified to please the Thai palate. Sometimes the cooks are inventive and modify dishes from the other regions, too. These days, the food that is made for the Royal Household is not much different from the common folks' dishes; in fact, some of the dishes are even prepared for sale to the general public in various outlets.