Preparing soup with an electric rice cooker is very simple. First, add the soup ingredients and water into the rice cooker, then select the appropriate program or setting for soup cooking (usually the "soup/porridge" program). Next, let it boil and cook for a while until the soup ingredients are fully cooked. Finally, add any desired seasonings, such as salt, pepper, etc. Remember to always pay attention to the safety instructions for using the rice cooker during operation.