Glace Icing is smooth, runny and glossy and is ideal for sponges, fairy cakes, biscuits, cookies and finger buns. It sets hard and so it also makes an ideal edible glue (for those fiddly Gingerbread Houses).
How do I get my icing to set hard?
Chilling and adding sugar are the two tastiest ways to harden tub frosting. Simply place the tub in the refrigerator and chill for a few hours, depending on the size of the tub, to firm up the frosting. Add sugar to the frosting by first scooping the desired amount of frosting from the tub and placing it in a bowl.
How long does it take for frosting to harden?
Pipe icing onto cookies and decorate, as desired. (If using sanding sugar or sprinkles, they need to be added before the icing starts to set.) Allow icing to completely harden at room temperature before enjoying (this can take anywhere from 3 hours to overnight depending on the consistency and thickness of your icing.)