5 Minute Fudge

2/3 C. evaporated milk 2T. butter or margarine 1 2/3 C. sugar 1/2 t. salt 2C. mini marshmallows 1 1/2 C. semi-sweet chocolate chips 1 t. vanilla In a saucepan over medium heat,combine milk,butter,sugar,and salt;bring to a boil and cook for 5 minutes.(Begin timing when bubbles form around edges.) Stir constantly.Remove from heat. Stir in marshmallows,chips, and vanilla;stir vigorously until marshmallows and chocolate chips are melted.Pour into buttered 8" square pan.