A rice cooker may be used to prepare soft-boiled, medium-boiled, or hard-boiled. A simple hit of the cook button and the addition of a timer will do this. When the timer goes off, serve the egg and savor it. The aforementioned times can be adhered to, depending on the method of boiling: 8-minute soft-boiling time (for a medium boiled 11 minutes, and 13 minutes for completely cook eggs in a rice cooker) According to user reviews 11 minutes for medium boil eggs in a rice cooker is the best time. However, a timer should be set for 15 minutes for soft-boiling eggs with rice and 25 minutes for hard-boiling if the two are to be prepared together.