Keep whole for now: toast, cool and grind to a fine powder.
Method
Put a pan on the hob without oil and set it over a low flame.
When the pan is warm, add the garam masala: 1.6–2.4 g cassia bark, 3.3 g green cardamom pod, seeds only, 1.2 g star anise, 0.2 g mace blade and 6 g clove.
Toast for 3–4 minutes over a low flame, shaking the pan several times.
Take the pan off the heat and leave the spices to cool.
Grind the cooled spices in a spice grinder until fine.
Store in an airtight container.
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Cassia bark
Ceylon cinnamon
True cinnamon: thinner, papery quills, milder and sweeter. Use about 1.5 times the weight, and taste.
Use about a third of the weight (0.5 g ground for a 2.5 cm piece), stirred in with the ground spices rather than fried whole, since the powder burns quickly.
Use 1 g ground for 4 g whole (or 1 small pinch per 2 to 3 whole cloves). Add with spice powders; disperses intense warmth quickly, so use with restraint.
Allspice berries
Use 100% of the weight whole in tempering. Imparts a warm, clove-like aromatic profile combined with hints of nutmeg and cinnamon.