In a cast iron skillet (Buy it here) dry roast all the whole spices except turmeric till fragrant and light brown in color. Turn off the heat. Let the roasted spices cool down for few minutes.
In a mixer (Buy it here) blend the roasted spices along with turmeric to a coarse powder.
If you prefer sieve the powder to get fine consistency curry powder.
Store Curry Powder in an airtight container at room temperature. Make sure to use clean and dry spoon to scoop out curry powder.