Note: I tend to use whole ingredients when I can which I then grind for my mixes and blends, but if you don't have them all, just use pre-ground powders and reduce the quantities in the recipe by half. So for 2 tablespoons of cumin seeds you use 1 tablespoon of ground cumin. Reduce any others you don't have whole by half as well and stir in with any other powders when making.
Store in a cool place in an airtight container and out of direct sunlight. Use within 3 months.
Note: If you have the time, dry toasting the whole ingredients before cooling and grinding will add even more flavour to your final chlii powder.