Combine in a mixer the almonds both bitter and sweet, half of the sugar, an egg white, vanilla extract and grind everything.
Add the other egg white, the remaining part of granulated sugar, the ammonia for cakes and continue grinding until you get a fine mixture.
Transfer the mixture into a sac à poche with a smooth nozzle and create amaretti on a baking sheet lined with baking paper.
Lightly moisten the tip of the amaretti with water and sprinkle with icing sugar before baking.
Preheat the oven and bake at 170 ° for 18 minutes.
Remove from the oven and serve cold.