Preheat the oven to 190C/375F/Gas 5. Line a baking tray with parchment paper or a silicone mat, and set aside.
Whisk together the oil, sugar, egg, and vanilla until combined. Set aside.
Whisk together the flour, baking powder, salt, spices, and raisins. Add the wet ingredients, and combine to form a soft dough.
Transfer the dough to the prepared baking tray, and shape into a roll, about 25cm (10") long. Gently press to flatten to a depth of 2cm ( 3/4").
Bake for about 20 minutes until lightly browned. Cool slightly, then carefully cut into 1cm slices.
Place the slices back on the baking tray, cut side up, and bake for a further 5 minutes until crisp. Turn them over, and repeat. Let cool for a few minutes before transferring to a wire rack to cool completely.
Video
Notes
Cookies stay fresh, in an airtight container, at room temperature for up to 1 week. They also freeze well for up to 3 months. Thaw overnight in the fridge.