Melting Snowmen Cookies. Kids will love making these adorable and tasty treats! With just a bit of royal icing, a few chocolate buttons and marshmallows, they can turn round vanilla cookies into melting snowmen cookies. Depending on their ages, you can have the biscuits ready to decorate, or also get them involved with the baking! There are a few chilling and drying stages, so plan to start early in the day, or they can be made over two days.