Preheat the oven to 180c/350f.
Mix all dry ingredients in a bowl.
Pour in the olive oil and rub it through with your fingers until the mixture looks crumbly.
Add the cold water one tablespoon at a time until a soft dough forms.
Roll the dough out to 2 to 3 mm thickness (we do this between two silicone baking sheets or baking paper).
Cut into festive shapes, or cut into squares for simple crackers.
Transfer the cookies to a lined baking tray, and bake for 12 to 14 minutes until lightly golden.
Allow to cool completely on the tray so they crisp up properly.