Melt the white chocolate

• Melt the white cooking chocolate in a bowl over a pan of simmering water.

Coat the marshmallows

• Dip the marshmallows into the melted chocolate until fully coated.
• Place them on a tray and chill in the fridge to set.

Draw the ghost faces

• Once set, use the black icing pen to add the ghost's eyes and mouth.

Assemble the cookies

• Melt a little more white chocolate and add a small amount to the centre of each cookie.
• Place a chocolate-covered marshmallow on top and allow it to set.