Place the cinnamon stick in a small zip-top plastic bag, seal it, and bang it a couple of times with a rolling pin, skillet, or mallet (anything firm and heavy) to break it into small pieces.,
STEP 2
Place the cinnamon pieces, cumin, coriander, peppercorns, cardamom, and cloves in a small heavy skillet set over medium heat.,
STEP 3
Cook, stirring constantly, until the smell is very aromatic and the spices are lightly toasted, about 2 minutes.,
STEP 4
Let cool.,
STEP 5
Transfer the mixture to a clean coffee grinder and grind into a fine powder (or use a mortar and pestle and some elbow grease).,
STEP 6
Transfer the ground spices to a fine-mesh sieve set over a bowl and sift.,
STEP 7
Regrind whatever large pieces remain in the sieve and add them to the bowl with the ground spices.,
STEP 8
Add the turmeric.,
STEP 9
Whisk well to combine and transfer the mixture to an airtight jar.,