The recommended cooking time for boiling eggs in a rice cooker is typically around 8 to 10 minutes. This duration ensures that the eggs are fully cooked without overcooking, which can lead to a rubbery texture. The exact time may vary slightly depending on the rice cooker's model and the desired level of doneness. For instance, if you prefer a soft-boiled egg, you might want to stop the cooking process after 8 minutes, while a hard-boiled egg might require the full 10 minutes.

The reason for this cooking time lies in the way rice cookers operate. These appliances use a combination of steam and heat to cook rice, and this same method can be adapted for boiling eggs. The steam helps to cook the eggs evenly, while the heat ensures that the egg whites and yolks are fully set. According to a study published in the Journal of Food Science, the ideal temperature for boiling eggs is around 212°F (100°C), which is the boiling point of water. Rice cookers are designed to maintain this temperature, making them an effective tool for boiling eggs.

In addition to the cooking time, it's important to consider the initial preparation of the eggs. Before placing them in the rice cooker, eggs should be brought to room temperature. This helps to ensure even cooking and prevents the eggs from cracking during the boiling process. Furthermore, some experts recommend placing the eggs in a steaming basket or a heatproof container to prevent direct contact with the hot surface of the rice cooker, which can cause the eggs to stick or crack.

In summary, boiling eggs in a rice cooker typically takes 8 to 10 minutes, depending on the desired level of doneness and the specific model of the rice cooker. This method is efficient and effective, thanks to the appliance's ability to maintain a consistent temperature and utilize steam for even cooking. By following proper preparation steps and adhering to the recommended cooking time, you can achieve perfectly boiled eggs every time.