To boil pork feet in an electric pressure cooker, the general guideline is to cook them for about 1 to 1.5 hours on high pressure. This duration ensures that the pork feet are thoroughly cooked and tender. The exact time may vary depending on the size and thickness of the pork feet, as well as the specific model of the electric pressure cooker.

The reason for this cooking time is that pork feet contain a significant amount of connective tissue, which needs to be broken down to achieve tenderness. The high pressure and temperature inside an electric pressure cooker accelerate the process of tenderizing the meat by breaking down the collagen and elastin proteins. Additionally, the sealed environment of the pressure cooker helps to retain moisture, which further contributes to the tenderness of the pork feet.

According to a study published in the Journal of Food Science, pressure cooking can reduce the cooking time of tough cuts of meat by up to 70% compared to traditional boiling methods. This is due to the increased temperature and pressure, which create a more efficient cooking environment. Furthermore, the Journal of Food Science and Technology reported that pressure cooking can improve the texture and flavor of meat by enhancing the extraction of natural flavors and juices.