01 -
Preheat the oven to 170C/325F (fan). Line two baking trays with silicone mat or baking parchment.
02 -
Using a hand whisk or mixer, whisk the egg whites to stiff peaks.
03 -
Fold in the ground almonds, caster sugar, and vanilla extract. Slowly stir in amaretto until mixture forms a thick, sticky paste.
04 -
Scoop mixture and roll into walnut-sized balls. Roll each ball first in caster sugar, then in icing sugar. Place on baking tray and slightly flatten with finger.
05 -
Bake for 15 minutes. Cool for 5 minutes on tray, then transfer to cooling rack.