What can be used as an alternative to chocolate that can be used to stencil shapes and dried into the shape in the fridge? Do melted marshmallows have the same usability and dry solid once refrigerated? Can I add a food colouring to make them black? Would this affect them drying solid? I want to make some "cobwebs" which would stand on top of a cake with the use of support rods but I can't use chocolate due to an allergy. Thanks for any help.