1 (14 oz.) can sweetened condensed milk
1 (12 oz.) pkg. semi-sweet chocolate chips
1 (1 oz.) square unsweetened chocolate (optional)
1 1/2 c. chopped nuts (optional)
1 tsp. vanilla

Butter square 8"x8"x2" pan. Heat milk, chocolate chips and unsweetened chocolate over low heat, stirring constantly until chocolate is melted and mixture is smooth; remove from heat. Stir in nuts and vanilla. Spread in pan. Refrigerate until firm. Cut into 1" squares. 64 candies.