Compared to a commercial curry powder, this one is dark, slightly bitter, and salt-free. All the ingredients in this version are available at most supermarkets, except the fenugreek seeds, which you can find in Indian and Middle Eastern markets.
Combine the first 6 ingredients in a spice or coffee grinder, and process until finely ground. Place the spice mixture in a small bowl; stir in the turmeric and red pepper. Store in an airtight container.