Set power select on high. In a medium glass bowl, heat butter 1 - 1 1/2 minutes or until melted; stir in sugar, egg, flour, baking powder, vanilla and nuts. Pour batter into greased 8 or 9 inch round baking dish. Set power select at Medium. Heat 7 - 8 1/2 minutes; let stand, covered 10 minutes. Meanwhile, in a small glass bowl, heat butterscotch 3 - 4 minutes or until melted; add food coloring, stirring until smooth. Spread over brownies; cut into squares to serve Yield: 16 brownies