What sets royal icing apart from other frostings and glazes is that it hardens when cooled, making it a great choice for decorated cookies and gingerbread houses.

Piping bags for icing The tools you’ll touch the most when creating your royal icing designs are likely the piping bags: conical plastic bags that you fill with icing and then attach to piping tips.

Estimations for how long you need to let royal icing dry vary, but you should typically let it sit for at least this long.