Preheat the oven to 180°C (350°F).
Blend or mash the chickpeas with the amaretto or orange juice until very smooth.
Transfer to a bowl and mix with the ground almonds, powdered sugar and vanilla until a soft dough forms.
If using, stir in the orange zest.
Shape into approximately 20 small balls or rustic spoonfuls and place on a lined baking tray.
Gently flatten each one slightly.
Bake for 10–12 minutes until lightly golden around the edges.
Allow to cool completely before serving.