Persian Raisin Cookies

1 cup unsalted butter

1 1/2 cup granulated sugar

2 cups all-purpose flour

2 large eggs

1 ts vanilla extract

1/2 ts saffron, crumbled

1/8 ts salt

1 1/2 cup raisins

Source: http://www.food.com/recipe/persian-raisin-cookies-401179