We had Jocelyn over for dinner, and I made a yellow cake with chocolate glaze. I got the glaze from Rachel at www.heart-of-light.blogspot.com.
It's really easy. I used 3 oz of semi sweet chocolate chips, 3 oz butter, and 3 tablespoons powdered sugar. I microwaved it until melted, then whisked it together, then poured it onto the cake. It was delicious!!!