Preheat the oven to 175C/350F.
Line and grease 2 baking trays.
Put all the ingredients into a blender and process until combined and soft.
This will take up to 10 minutes depending on the strength of your blender. If your blender is not too strong soak the dates in boiling water for 10-20 minutes and then drain and dry thoroughly.
Take heaped tablespoons of mixture and roll into a ball.
Place the ball on the baking tray and flatten the ball with the palm of your hand to the desired thickness (this will dictate how crunchy the biscuits bake). Repeat with the remaining mixture; it will make approximately 15 biscuits.
Bake for 10-12 minutes for thinner, crunchier cookies and 12-15 for thicker cookies.
The cookies will still be soft straight out of the oven but will harden upon cooling.
Allow to cool completely before using to make the base.