1:Preheat the oven to 170ºC/gas 3, and grease and line two baking sheets.
2:In a bowl, whisk the egg whites until firm. Gently fold in the sugar, almonds and amaretto to make a smooth paste.
3:Using a teaspoon or a piping bag, place dollops of the mixture on the trays, 2cm apart.
4:Bake in the oven for 10 to 15 minutes, or until lightly golden. Transfer to a wire rack to cool, before dusting with icing sugar.