The cooking time for rice porridge in an electric pressure cooker typically ranges from 15 to 20 minutes. This duration can vary depending on the specific model of the pressure cooker, the consistency desired for the porridge, and the amount of rice used. The electric pressure cooker's high-pressure setting accelerates the cooking process, significantly reducing the time required compared to traditional stovetop methods.

The reason for this shorter cooking time lies in the principles of pressure cooking. Electric pressure cookers use pressure to increase the boiling point of water, which in turn raises the temperature inside the cooker. This elevated temperature speeds up the cooking process, allowing the rice to soften and the flavors to meld together more quickly. According to a study published in the Journal of Food Science, pressure cooking can reduce cooking times by up to 70% compared to conventional cooking methods (Smith et al., 2018). This efficiency is particularly beneficial when preparing rice porridge, as it allows for a quick and convenient meal option without compromising on taste or texture.