The optimal rice timer duration for cooking rice varies depending on the type of rice and the cooking method used. Generally, for long-grain white rice, a timer set for about 18-20 minutes is sufficient when using a standard rice cooker. This duration allows the rice to absorb the water and cook to a perfect texture. Brown rice, which requires more time to cook due to its higher water content and bran layer, typically needs a timer set for 45-50 minutes. These guidelines are based on the fact that rice needs to be cooked at a consistent temperature, usually around 212°F (100°C), to achieve the ideal texture and flavor.

The reason for these specific timer durations lies in the cooking process and the properties of rice. White rice, with its lower water content and refined grains, cooks relatively quickly. The timer duration ensures that the rice is fully hydrated and cooked through without becoming mushy. Brown rice, on the other hand, has a higher water content and a tougher bran layer, which requires more time to soften and absorb the water. The longer cooking time for brown rice is necessary to break down the bran and allow the grain to absorb the water, resulting in a chewy and nutty texture.

According to a study published in the Journal of Food Science, the cooking time for brown rice can vary significantly depending on the rice variety and the cooking method. For example, a study conducted by the USDA found that the cooking time for brown rice can range from 45 to 50 minutes, with the optimal temperature being around 212°F (100°C). This aligns with the general recommendations for cooking brown rice, emphasizing the importance of a longer cooking time to achieve the desired texture and flavor.

In conclusion, the rice timer duration is crucial for achieving the perfect texture and flavor in cooked rice. The specific durations for white and brown rice are based on the cooking process and the unique properties of each type of rice. By following these guidelines, home cooks can ensure that their rice is cooked to perfection every time.