1 box confectioners sugar
1 stick butter
1/2 c. cocoa
1/4 c. milk
1 tsp. vanilla

Sift confectioners sugar and cocoa into glass bowl. Pour melted butter and milk on top, but do not stir yet. Put into microwave for 2 minutes on High. Take and stir. Add vanilla and stir well. Pour into greased Pyrex dish and refrigerate for 1 hour.