Ensure that you have to correct rice for the recipe you are cooking. Also, do not disturb the rice during cook time. Some other reasons could be: correct measurement of rice and water, inadequate simmer or cook time, correct pot size, appropriate burner size. Refer to cooking instructions in the FAQ below.
Cook 1 cup uncooked long grain or medium grain rice, with 2 cups water. Bring 2 cups of water to a boil in a 2-quart heavy saucepan. Stir in 1 cup of rice. Cover, reduce heat, and simmer for 20 minutes or until all the water is absorbed. Remove from heat and let steam with the lid on for 2 minutes longer.