Ancient people’s Marvelous Cook Book mentioned that the Stir-fried Holy Basil has been popular since ancient time. It is believed that it came into existence around the reign of King Rama VII and was brought by Chinese settlers for sale in their a la carte restaurants. The stir-fried holy basil or Phad Kaprao probably became truly popular around 1957. At that time, Thai people used to eat hot and spicy food. Spices and vegetables were mixed together in fiery stir-fries and wild curries. At that time, fried dishes had not really gathered any popularity in Thailand.
Thai people have done away with the soybean paste but kept the basil leaves, chili and garlic and added a whole variety of different proteins to make the dish the firm favorite it is today.