I am baking cupcakes for the school bake sale to support the Breast Cancer awareness campaign. I did a trial run last week. I made a cream cheese icing (whipped Philly + thick cream + icing sugar) and spooned it on top, then drew a pink ribbon using Dr Oetker's ready icing tube. It was delicious but by evening the pink ribbon was melting into the cream cheese icing. What can I do to prevent this? Not in UK so availability of ingredients is a bit limited.