In a large bowl beat butter until creamy. Gradually beat in powdered sugar, then salt, vanilla, flour, and salt. When blended and smooth stir in oats. shape dough into 1-inch balls and place on ungreased cookie sheets, about 2 inches apart. you can also flatten by pressing with fingers. bake 18-22 minutes or until golden brown. while still warm roll in powdered sugar. cool on wire rack. makes 2 1/2 to 3 dozen cookies.