Mix ingredients together in order given. Pour into a 9" x 13" greased pan. Bake at 350-degrees (preheated oven) for 30 minutes. Let brownies cool. To make the frosting, beat together and spread over cooled brownies. Chill until set (about 30 minutes). To make the glaze; melt chips and margarine over boiling water. After chips are melted, set aside to cool. Pour glaze over frosted brownies in a lacing pattern. Let stand until firm.