Grate away the top layer of the peel from the orange.
Mix all the ingredients for the cookies and make a cookie dough. Let it rest for 1 hour.
Roll out the dough and use cookie forms. Place the cookies on a baking sheet. Repeat this procedure until you used all the dough.
Preheat the oven at 170 degrees Celsius.
Place the cookies in the oven for 10 minutes. Take them out and let them cool down.
Time to do the decoration. Mix the egg white with the icing sugar. Add the citron juice and let the mixture rest for 15 minutes.
Pour it in a piping bag and decorate the cookies.