Next week, we are going to be icing biscuits as a vaguely Halloween activity (we meet in a church so that's as close to anything Halloween related we can get away with) They have made icing before for another badge that escapes me. But I want 15 guides to ice abut 75 gingerbread men (like the ones you get in supermarkets) and various other biscuits. But I can't work out how much icing sugar to get. They are going to make water icing. I have some food colouring at home they can use an I already have lots of piping bags so that isn't a problem. Does anyone have any guesses or suggestions for me?