• 25 g (⅘ oz) coriander seeds
• 15 g (½ oz) black peppercorns
• 20 g (⅔ oz) cardamom seeds
• 1 cinnamon stick
• 1 star anise
• 7 g (¼ oz) caster (superfine) sugar

Preheat the oven to 170°C (325°F/Gas 3). Roast the spices for 8 minutes, then grind in a spice grinder. Add the sugar and grind until the sugar is powdered. Pass through a fine sieve. Set aside.