- With the rack in the middle position, preheat the oven to 400°F (200°C). Line a baking sheet with a silicone mat or parchment paper.
- In a food processor, combine the flour, sugar and baking powder. Add the butter and pulse until the butter forms pea-sized pieces. Add the coconut milk and lime zest. Process until the dough is just moistened.
- On a lightly floured surface, roll out the dough into an 8-inch (20 cm) disc. Place on the prepared sheet. Sprinkle with sugar and, if desired, shredded coconut. Cut into 8 wedges, keeping the disc intact.
- Bake for 20 minutes or until the scones are golden brown. Let cool.