"I recommend making a meringue, frosting the cake with a piping bag ... For extra support in the freezer, you can use a jar of marshmallow fluff or creme. Mix it into your finished meringue ...

Cream together the butter and sugar ... smooth (so that lumps don’t show through when the cake is covered with fondant icing). For the marshmallow fondant, add the marshmallows, a tablespoon ...