Place the butter, cane sugar, egg and salt in a bowl, mix using the whisk on a hand mixer until the mixture becomes lighter in colour.
To finish the dough
Mix the flour with all the other ingredients up to and including the orange zest, mix into the butter and sugar mixture, chill for approx. 30 mins.
Roll out the dough in batches between two sheets of baking paper to approx. 2 mm thick. Cut out the gingerbread men.
Place the biscuits on two baking trays lined with baking paper.
Approx. 9 mins. in the centre of an oven preheated to 200°C.
Mix the egg white with as much icing sugar as it takes to produce a thick icing. Transfer the icing to a piping bag with a smooth nozzle (approx. 2 mm in diameter), pipe the eyes and mouth onto the gingerbread men, leave to dry.