Persian Saffron Basmati Rice

1.Add rice to a rice pot. Rinse the rice 2-3 times until the water becomes clear.
2.Add the 3 1/2 cups of water, butter, and salt. Turn on rice cooker and cook until done.
3.Add saffron to the bowl of a mortar and pestle, grind. Add 1 teaspoon hot water and mix evenly. Take 1/2 cup of the cooked rice and add the saffron mixture. Mix well until rice is fully combined and becomes a yellow color.
4.Add yellow rice on top of white rice as a garnish.