Melt your extra doc chocolate wafer over low heat.

Fill mold, chill until solid and remove from pan.

Slice the brownies, into 9 large pieces.

Place a small dab of melted chocolate on the back corner of each brownie let cool until semi-solid.  This helps hold the white chocolate wafer up, although to be honest, it seems like the icing would hold it on its own.

Place the large white chocolate wafer in front of the dab of dark chocolate to make the moon.

Place a dark chocolate cat in front of the white chocolate moon. Snuggle it down into the icing.  The chocolate cats are thick enough to stand on there own.